Toilet Tower Defense looks chaotic on the surface, but under the memes and screen-shaking bosses is a surprisingly strict progression system. Every unit falls into a clearly defined role and rarity tier, and understanding that structure is the difference between wasting hours on bad pulls and building a lineup that actually melts late-game waves. Before you worry about how to unlock everything, you need to know what you’re unlocking and why it matters.
Core Unit Roles You’ll Be Unlocking
Every unit in Toilet Tower Defense is designed around a specific battlefield role, and the game heavily punishes players who ignore this. DPS units are your primary damage dealers, scaling hard with upgrades and usually defining how far you can push Endless or Raid modes. Support units don’t top damage charts, but their buffs, debuffs, stun chains, and aggro control are mandatory for boss fights with tight hitbox windows and enraged phases.
You’ll also encounter hybrid units that blur the line, offering moderate DPS with utility like slow effects or armor shred. These units are often overlooked early, but they’re crucial when enemy scaling starts outpacing raw damage. Unlocking a balanced roster across these roles is required to clear certain quests and progression gates.
Understanding Rarity Tiers and Pull Odds
Rarity determines not just power, but how a unit is unlocked and how much investment it demands. Common and Rare units are typically unlocked through basic currency summons and early-game quests, acting as onboarding tools rather than endgame staples. Epic units mark the first real power spike and are often tied to story mode milestones or improved gacha banners with slightly better RNG.
Legendary and Mythic units sit at the top of the hierarchy, usually locked behind low-percentage pulls, raid-exclusive drops, or event banners with limited availability. These units often have unique mechanics like I-frames during abilities, boss-specific damage multipliers, or global buffs that change how entire teams function. If you’re chasing full completion, understanding which banners rotate and when to save currency is non-negotiable.
Event, Limited, and Secret Units
Not every unit lives in the standard summon pool, and this is where most collectors get stuck. Event units are tied to seasonal updates, special bosses, or limited-time quests, and missing the window can lock you out for months. These units often return later, but sometimes with altered unlock conditions or higher grind requirements.
Secret units operate on hidden criteria, such as clearing specific stages without leaks, triggering obscure interactions, or surviving extreme difficulty modifiers. The game never clearly explains these conditions, making community knowledge and experimentation essential. If your goal is unlocking every unit, you’ll need to engage with every game mode, not just the most efficient farming routes.
Why Rarity Isn’t Everything
Higher rarity doesn’t automatically mean better performance in every scenario. Some lower-tier units scale absurdly well with upgrades or synergize perfectly with top-tier supports, outperforming flashier options in sustained DPS tests. The meta shifts frequently with balance patches, so unlocking broadly rather than tunneling on one rarity tier protects your progression long-term.
This is why understanding unit types and rarities comes first. Once you know how the game categorizes power and access, every unlock method, currency sink, and event grind starts making sense instead of feeling random.
Core Currencies and Resources: Coins, Gems, and Special Tokens Explained
Once you understand unit rarity and where different units come from, the next bottleneck becomes currency management. Every unit unlock in Toilet Tower Defense is gated by one or more resources, and wasting them early is the fastest way to stall your collection progress. Coins, Gems, and a rotating cast of special tokens each serve a distinct purpose, and treating them interchangeably is a rookie mistake.
Coins: The Backbone of Early and Mid-Game Progression
Coins are your most common currency and the one you’ll earn passively just by playing. They primarily come from Story Mode clears, Infinite Mode waves, daily missions, and basic challenges. Early on, Coins are used for standard summons, unit upgrades, and occasionally reroll-style mechanics tied to common and rare units.
Where players go wrong is overspending Coins on low-impact upgrades before their roster stabilizes. Coins scale well into mid-game, but their value drops sharply once you’ve unlocked most common and uncommon units. Save them once your core team is functional, because later banners and mechanics often require Coins alongside premium currency to roll efficiently.
Gems: Premium Currency and Gacha Gatekeeper
Gems are the most important resource if your goal is unlocking every unit, especially Legendary, Mythic, and limited banner units. You earn Gems from milestone achievements, harder difficulty clears, event rewards, codes, and occasional daily login bonuses. Unlike Coins, Gem income is intentionally slower, making every spend a strategic decision.
Most high-tier units sit behind Gem-based banners with low pull rates and heavy RNG. Many banners use soft pity systems, where pull odds increase after a certain number of rolls, making hoarding Gems far more effective than spending them as soon as you earn them. If a banner features an exclusive or returning event unit, it’s almost always worth skipping other banners and dumping Gems there instead.
Special Tokens: Events, Raids, and Hidden Progression Systems
Special tokens are where Toilet Tower Defense gets complex, and where most secret or limited units are locked. These include event tokens from seasonal updates, raid-exclusive medals, boss-specific drops, or mode-specific currencies tied to challenge runs. Unlike Coins and Gems, these tokens usually expire or become useless once an event ends.
These tokens are often exchanged in limited shops for event units, unit shards, or direct unlocks. Some secret units require holding a specific token while completing hidden conditions, such as no-leak runs, extreme modifiers, or perfect boss clears. If an event introduces a new token, assume it’s tied to at least one unit unlock and prioritize farming it immediately.
Quests, Missions, and Currency Multipliers
Not all currency is earned equally, and understanding where to farm matters as much as what you farm. Weekly quests, event missions, and challenge boards often offer massively boosted rewards compared to normal play. These are designed to funnel players toward specific modes that unlock new units or currencies tied to them.
Some units are indirectly locked behind these systems, requiring you to complete quest chains before their banner or token shop even appears. Ignoring these missions can leave you with plenty of Gems but no way to actually spend them on the units you’re missing. Always clear time-limited quests first, then return to long-term farming routes.
RNG, Pity, and Resource Timing
Every premium currency system in Toilet Tower Defense is built around RNG, but that doesn’t mean outcomes are purely luck-based. Pity counters, guaranteed pulls, and milestone rewards all reward players who spend in batches rather than randomly. Tracking how close you are to a guaranteed unit is just as important as how many Gems you have.
Special tokens often bypass RNG entirely, offering direct unlocks if you meet the grind requirements. This makes token-based units some of the most reliable additions to a full collection, provided you don’t miss the event window. Mastering when to grind, when to save, and when to spend is what separates full collectors from players permanently stuck one unit short.
Unlocking Units Through the Shop, Summons, and RNG Mechanics
With currencies, quests, and event tokens covered, the next major gate to a full collection is understanding how Toilet Tower Defense actually distributes its units. Most units enter your roster through shops, summon banners, or layered RNG systems that reward planning more than raw luck. This is where players either complete their collection efficiently or bleed resources chasing the wrong pull.
Permanent Shop Units and Direct Purchases
The easiest units to unlock are those sold directly through permanent shops using Coins or Gems. These units usually form the backbone of early and mid-game team comps, offering consistent DPS, crowd control, or economy scaling without any RNG involved. If a unit is available for a flat price, it’s almost always worth grabbing early to stabilize your clears.
Some shops rotate stock weekly or after progression milestones, meaning new units won’t appear until you clear specific modes or maps. If a unit suddenly shows up after beating a boss or difficulty tier, that’s a progression-gated unlock, not a random rotation. Always recheck shops after major clears, as many players miss units simply because they never refresh vendor inventories.
Summon Banners and Standard RNG Pulls
High-tier and meta-defining units are primarily unlocked through summon banners using Gems or premium summon tickets. Each banner has its own unit pool, rarity weights, and drop rates, so pulling blindly across banners is the fastest way to waste resources. Focus on banners that contain units you’re actively missing, not just the newest release.
Standard banners usually include a mix of common, rare, and legendary units, with low base odds for top-tier pulls. However, duplicates often convert into shards or secondary currencies, which are later used for upgrades or shop exchanges. Even “bad” pulls contribute to long-term progression if you’re summoning with a plan.
Pity Systems, Guaranteed Pulls, and Smart Spending
Toilet Tower Defense heavily relies on pity mechanics to soften RNG, but these systems only reward disciplined players. Pity counters typically guarantee a high-rarity unit after a set number of pulls on the same banner. Resetting banners early or swapping between banners often resets or pauses this counter, slowing your progress dramatically.
The optimal approach is saving until you can commit to a full pity cycle in one session. This minimizes risk and ensures you walk away with at least one new unit instead of fragments of progress across multiple banners. Tracking your pity count manually is essential, as the game doesn’t always surface it clearly.
Limited-Time Banners and Event-Exclusive Units
Event banners introduce some of the rarest units in the game, often tied to seasonal events, collaborations, or major updates. These units usually disappear entirely once the event ends, with no guarantee of a rerun. If a banner explicitly states limited or exclusive, assume it may not return for months, if ever.
These banners often feature boosted rates or special pity rules, such as guaranteed event units after a certain number of pulls. Because of this, they’re some of the best value banners in the game if you’ve saved enough resources. Skipping them to pull on standard banners is one of the most common collector mistakes.
Secret RNG Units and Hidden Unlock Conditions
Beyond visible banners and shops, Toilet Tower Defense includes secret units tied to layered RNG or hidden conditions. These may require pulling a specific unit while holding an event token, clearing a mode without leaks, or triggering rare boss variants. The game rarely explains these conditions outright, relying on community discovery and patch notes.
Some secret units only become available after meeting prerequisites, such as owning a certain unit or completing a challenge on extreme difficulty. If you notice a banner or shop option appear unexpectedly, it’s often because you silently met an unlock condition earlier. Keeping track of unusual clears, perfect runs, or odd drops can clue you into secret progression paths before they disappear.
Game Modes and Progression-Based Unlocks (Story, Endless, and Challenges)
Once you’ve exhausted banners and RNG-based unlocks, the rest of Toilet Tower Defense’s unit roster is gated behind raw progression. These units aren’t about luck or currency efficiency; they’re about proving mastery across the game’s core modes. If you’re aiming for a full collection, ignoring these modes will hard-lock multiple high-impact units.
Story Mode Clears and Chapter-Based Unit Unlocks
Story Mode is the foundation of long-term progression, and several units are locked directly behind chapter completion. Clearing specific worlds or finales automatically unlocks units, usually ones designed to counter mechanics introduced in that chapter, like shielded enemies or high-HP boss waves. These unlocks are permanent and account-wide, making Story Mode non-negotiable for collectors.
Later chapters often require clean execution rather than brute-force DPS. Expect tighter wave pacing, enemies with armor scaling, and bosses that punish poor placement or mistimed abilities. Replaying earlier chapters with over-leveled units won’t unlock anything new, so push forward instead of farming outdated stages.
Endless Mode Milestones and Wave-Based Rewards
Endless Mode is where stamina, economy control, and scaling knowledge directly translate into unit unlocks. Certain units only unlock after reaching fixed wave milestones, such as Wave 50, 75, or higher, depending on the map. Failing early or extracting resets progress toward these unlocks, so consistency matters more than speed.
These units tend to be late-game staples with strong scaling, splash coverage, or global utility. Building for Endless means prioritizing units with infinite or exponential scaling over early burst DPS. If your loadout can’t survive armor ramping and enemy speed creep, you’ll hit a progression wall fast.
Challenge Modes and Difficulty-Gated Units
Challenge Modes are some of the most misunderstood unlock paths in Toilet Tower Defense. Many players farm them for currency and stop there, but several units are locked behind clearing specific challenges on higher difficulties. These clears often require modifiers like limited unit slots, reduced placement caps, or enemy buffs that fundamentally change how you build.
Units unlocked this way usually reward technical play, offering strong utility, debuffs, or niche synergies rather than raw damage. Perfect clears, no-leak runs, or sub-wave completion times may also be required, even if the game doesn’t explicitly state it. If a unit remains locked after a clear, check whether you met every hidden condition.
Mode-Specific Quests and Silent Unlock Triggers
Some progression-based units are tied to quests that only activate after interacting with certain modes. This can include clearing Story chapters with a specific unit equipped, reaching an Endless milestone on a particular map, or finishing a Challenge without using supports. The quest tracker doesn’t always surface these objectives until they’re already in progress.
These silent triggers are easy to miss but critical for completionists. If you notice progress bars moving without a visible quest, keep playing under the same conditions. Changing loadouts or modes mid-progress can stall or reset these hidden requirements.
Progression Checks That Gate Future Units
Finally, several units are locked behind progression checks rather than direct rewards. Owning a certain number of units, clearing a mode on extreme difficulty, or unlocking all units in a prior tier can silently unlock new units or banners. These checks often act as filters to ensure players understand core mechanics before accessing high-impact units.
If you’ve cleared content but aren’t seeing new unlocks, revisit earlier modes to confirm nothing was skipped. Toilet Tower Defense tracks progression more granularly than it lets on, and missing a single requirement can block an entire branch of the unit roster.
Event-Exclusive, Limited-Time, and Seasonal Units: How to Get Them Before They’re Gone
After progression gates and hidden challenges, the next major wall for completionists is time itself. Event-exclusive and seasonal units rotate in and out based on real-world schedules, and once they’re gone, they’re often unobtainable for months. If you want a full collection, these units demand priority the moment an event goes live.
Unlike permanent unlocks, these units are designed to test efficiency and consistency rather than raw skill. Missing a week, misusing currency, or farming the wrong mode can permanently set you back until a rerun happens.
Live Events and Limited-Time Maps
Most event units are tied to temporary maps or modes that only exist during a live event window. These maps usually drop event currency instead of standard rewards, and that currency is spent in a separate event shop. Clearing higher difficulties dramatically increases event currency per run, making early optimization crucial.
Some event units require more than just buying them from the shop. You may need to clear the event map on a specific difficulty, defeat a boss without leaking, or survive a fixed number of waves in an event Endless variant. Always check both the shop and the event quest panel before committing your currency.
Seasonal Units and Battle Pass Progression
Seasonal units are commonly locked behind a battle pass-style progression track. Free tracks usually include at least one unit, while premium tracks often gate higher-rarity or more mechanically complex units. Progress is earned through daily missions, weekly challenges, and raw playtime across most modes.
The key mistake players make is ignoring daily objectives until late in the season. Missed dailies mean grinding significantly more matches later, often forcing inefficient play. If a seasonal unit is near the end of the track, consistent daily completion matters more than raw skill.
Event Gacha, RNG Rolls, and Pity Systems
Some limited-time units are only obtainable through event-exclusive banners or capsules. These pulls use event currency or premium tokens and are fully time-limited. While RNG plays a role, most events include a hidden or visible pity system that guarantees the unit after a certain number of pulls.
To minimize waste, never roll early unless you understand the pity threshold. Saving currency until you can hit pity in one event cycle prevents partial progress from being wiped when the banner expires. If multiple event units share a banner, check the drop rates carefully before committing.
Boss Events, Raid Clears, and Community Milestones
High-end event units are often locked behind raid-style boss events or global community goals. These may require coordinated clears, high DPS checks, or surviving enrage timers with limited placements. Individual contribution thresholds still matter, even if the reward is tied to a global clear.
In some cases, simply participating isn’t enough. You may need to deal a minimum percentage of boss HP, clear the raid without dying, or finish within a time limit. These conditions aren’t always clearly stated, so watch your post-match rewards carefully to confirm progress.
Reruns, Return Events, and Missed Unit Recovery
If you miss an event unit, all hope isn’t lost, but patience is required. Most limited units eventually return through rerun events, anniversary banners, or special rotation shops. These reruns often increase the currency cost or tighten the unlock conditions, rewarding players who participated the first time.
When a rerun happens, prioritize any unit you missed over duplicates or cosmetics. Reruns are unpredictable, and some units don’t return for entire seasons. Keeping a reserve of premium currency ensures you’re ready when a rare unit finally comes back into rotation.
Questlines, Achievements, and Hidden Requirements for Secret Units
Once you’ve exhausted banners, raids, and reruns, Toilet Tower Defense shifts gears. The rarest units in the game aren’t rolled or bought. They’re earned through layered questlines, achievement chains, and conditions the game rarely explains outright.
These secret units are designed to reward mastery, consistency, and system knowledge. If you’re missing just one or two units from a “complete” collection, this is almost always where the gap is.
Multi-Stage Questlines and NPC Progression
Several secret units are tied to long-form questlines given by NPCs in the lobby or event maps. These quests often unlock sequentially, meaning you won’t even see later objectives until earlier ones are fully cleared. Skipping dialogue or changing servers mid-quest can reset progress, so always confirm completion before moving on.
Objectives typically mix modes, requiring Story clears, Infinite wave thresholds, and boss kills in a specific order. Some steps track cumulative stats like total enemies defeated or towers placed, not match wins. If progress seems stuck, check whether the quest requires a specific difficulty or map variant.
Achievement-Based Unlocks and Lifetime Stat Checks
Certain units unlock the moment a hidden achievement triggers, with no notification beyond the unit appearing in your inventory. These achievements pull from lifetime stats such as total damage dealt, total matches survived, or clearing a stage without losing any towers. Because these are backend checks, they can trigger mid-match or after returning to the lobby.
A common trap is over-optimizing for speed. Some achievements require inefficient play, like letting waves run longer or avoiding high-DPS units to prevent early clears. If you’re chasing one of these unlocks, adjust your loadout to match the requirement instead of your usual meta build.
Mode-Specific Conditions and No-Fail Runs
Several secret units are locked behind flawless clears in specific modes. This can include completing a Story chapter without leaking enemies, finishing Infinite with zero tower sells, or beating a boss without any unit deaths. The game doesn’t flag these runs as special, so you won’t know you succeeded until the unit unlocks.
To reduce risk, overlevel your core towers and avoid experimental placements. Stick to consistent aggro control, stable DPS curves, and safe upgrade timings. One misclick or panic sell can invalidate a 30-minute run.
Hidden Triggers, Time-Based Actions, and Obscure Requirements
The most infamous secret units rely on triggers that aren’t listed anywhere in-game. These can include interacting with environmental objects, placing specific units in a certain order, or completing a match at an exact wave breakpoint. Some even require failing a stage intentionally before winning it on the next attempt.
Time-based conditions also appear, such as clearing a map during a specific in-game event window or after server uptime passes a threshold. If a unit unlock feels random, it usually isn’t. Community discoveries often reveal these mechanics weeks later, so staying plugged into patch notes and player findings saves massive time.
Account-Level Restrictions and Progression Gates
Even if you meet the visible requirements, some secret units won’t unlock until your account hits certain progression markers. These can include player level, total units owned, or completing a full chapter set on a given difficulty. Newer accounts often hit invisible walls without realizing it.
Before attempting a secret unlock, confirm your account meets the expected baseline. Grinding a few extra levels or finishing neglected Story chapters can instantly make a previously impossible unit obtainable. This is especially common with late-game support units designed to stabilize Infinite and raid content.
How to Track and Verify Secret Unit Progress
Because Toilet Tower Defense rarely surfaces this information cleanly, manual tracking is essential. Keep notes on completed quests, achievement milestones, and any unusual actions taken during runs. Screenshots of NPC dialogue and end-of-match screens help confirm whether progress registered correctly.
If a unit doesn’t unlock when expected, don’t immediately retry. Re-enter the lobby, check your inventory, and confirm no follow-up quest appeared. Many secret units unlock silently, and players often already have them without realizing it.
Trading, Evolution, and Unit Upgrades That Unlock New Forms
Once you’ve cleared secret triggers and progression gates, the next major unlock path revolves around systems that sit just outside standard gameplay. Trading, evolution trees, and upgrade-based transformations account for a huge percentage of late-game and collector-focused units. These mechanics are easy to overlook because they don’t always present as “unlocks,” but they absolutely are.
Trading-Exclusive Units and Cross-Account Unlocks
Some units in Toilet Tower Defense never drop from stages or quests at all. They only enter the economy through trading, usually originating from limited-time events, discontinued banners, or early-access reward tracks. If you didn’t play during those windows, trading is the only way to obtain them.
Trading often requires a minimum account level and a trade license-style unlock, which is typically gated behind Story progression. High-value units also demand trade currency or consumable items as a tax, so hoarding these early saves massive time later. Always verify a traded unit is fully unlocked and not a skin variant, as cosmetics do not count toward collection-based unlocks.
Evolution Chains That Create Entirely New Units
Evolution is one of the most misunderstood unlock systems in the game. Certain units don’t exist as standalone drops and can only be created by evolving a base unit through multiple tiers. Each evolution stage often changes the unit’s role, hitbox, targeting behavior, or DPS scaling.
These evolutions typically require duplicates of the base unit, evolution-specific materials, and a large currency investment. Some late-tier evolutions also demand completion of a specific game mode, like Infinite waves past a threshold or a raid clear without leaking. If you evolve too early without meeting these hidden conditions, the evolution option simply won’t appear.
Upgrade-Level Breakpoints That Trigger Form Changes
Not every new form comes from evolution menus. Several units unlock alternate forms automatically when upgraded to a specific level cap during a match or in the lobby. These are permanent transformations, not temporary buffs, and they often add new abilities or alter attack patterns.
The key detail is that these upgrades usually require maxing a unit in a single run, not across multiple matches. If you’re short on cash generation or leak too early, the form won’t unlock even if you’ve upgraded that unit before. This is why support-heavy comps and slow-play strategies are essential when hunting upgrade-based unlocks.
Material Farming and Currency Efficiency
Evolution materials and upgrade catalysts are often tied to specific modes or difficulty tiers. Story mode rarely drops what you need for late-game forms, pushing players into Infinite, raids, or event stages with higher RNG variance. Farming inefficiently here is the fastest way to burn out.
Focus on maps with short wave timers and predictable enemy paths to maximize runs per hour. Even if the drop rates look similar, clear speed matters more than difficulty when farming evolution materials. Always check whether materials are tradeable, as buying them is sometimes faster than grinding.
Limited-Time Evolutions and Event-Locked Forms
Some evolutions are only available during events, even if the base unit is permanent. These event evolutions often sit in a separate menu and require event currency instead of standard materials. Miss the event, and the evolution becomes unobtainable until it reruns, if it ever does.
This is where many collectors get stuck with “incomplete” units. If an evolution is active, prioritize it over new pulls or side upgrades. Event evolutions frequently introduce meta-defining units with better scaling, I-frames on abilities, or utility that trivializes mid-game content.
RNG-Based Upgrades That Gate New Units
A small but brutal subset of unlocks are tied to RNG-heavy upgrade outcomes. These usually involve crafting systems where a successful roll upgrades a unit into a new form, while failure consumes materials. The odds are rarely shown, and pity systems, if they exist, are opaque.
The smartest approach is batching attempts. Save enough materials for multiple rolls instead of trying one at a time, which reduces emotional tilt and wasted resources. Community-tested thresholds often reveal soft pity breakpoints, so checking current player data before rolling can save days of grinding.
Why Upgrading the “Wrong” Unit Can Lock You Out Temporarily
One final trap catches even veteran players. Some evolution paths require an unevolved or lower-tier version of a unit to be present in your inventory. If you auto-evolve or trade away that base form, you may temporarily lock yourself out of a different branch.
Before committing to any evolution, check whether that unit has multiple paths or future forms planned in patch notes. Holding one spare copy of key units is a smart hedge, especially for units tied to raids or endgame metas. In Toilet Tower Defense, progression isn’t just about power, it’s about keeping your options open.
Optimal Progression Path: Fastest Way to Unlock Every Unit Without Wasting Resources
With the common traps out of the way, the goal now is efficiency. Toilet Tower Defense rewards players who sequence their unlocks correctly, not those who brute-force everything at once. If you follow a structured progression path, you can unlock every unit with minimal backtracking and zero resource dead ends.
Phase One: Story Mode First, Gacha Second
Your first priority should always be Story Mode clears, not summoning. Story stages unlock core currencies, early-game units, and key systems like evolution, traits, and limited shops. Many players waste premium currency rolling early, only to pull units they can’t evolve yet.
Clear Story chapters until you hit a real DPS wall, not a skill issue. At that point, you’ll have unlocked enough base units and materials to justify selective summons. This ensures every roll has immediate progression value instead of sitting unused in your inventory.
Phase Two: Build a Minimal Core Team, Not a Full Roster
Toilet Tower Defense heavily favors focused investment. You only need four to five units to clear most early and mid-game content, including raids and limited challenges. Spreading upgrades across too many units slows down unlock conditions tied to evolutions and damage thresholds.
Prioritize one main DPS, one AoE or crowd-control unit, one support or buffer, and one boss-killer with strong scaling. This core team will carry you through unlock requirements for other units, especially those gated behind clear times, damage dealt, or survival-based objectives.
Phase Three: Target Game Modes That Unlock Units Directly
Not all modes are equal when it comes to unit unlocks. Story and Challenge modes typically unlock base units or evolution prerequisites, while Raids and Endless modes gate higher-tier or alternate forms. Always check the reward tables before committing time.
If a unit is tied to wave milestones, like Endless Mode clears, push those only after your core team is optimized. If a unit drops from raid bosses, farm the lowest difficulty that still drops the required material. Higher difficulty isn’t always more efficient if your clear time doubles.
Phase Four: Currency Discipline Is Non-Negotiable
Most wasted progression comes from misusing premium currency. Gems, shards, or equivalent currencies should only be spent when they unlock new units or required evolution materials. Cosmetic pulls, reroll systems, or low-impact upgrades can wait.
Event shops are where this matters most. Event currency should almost always go toward exclusive units or evolution items first, not generic resources. If an event unit is unlockable through a shop and RNG, buy the guaranteed copy before rolling anything.
Phase Five: Time-Limited Units Take Absolute Priority
If an event is active, your progression path bends around it. Limited-time units, evolutions, and forms override all permanent goals because they may not return. Even if the unit isn’t meta now, future evolutions or buffs can make it essential later.
Structure your daily play around event quests, event modes, and event currency caps. Once you secure the limited unlocks, then return to Story, Raids, or Endless farming. Permanent content will still be there tomorrow; limited content won’t.
Phase Six: Batch RNG Systems and Never Chase Singles
When unlocking units through RNG-based crafting, traits, or evolution rolls, patience is a resource. Single attempts burn materials with no safety net and increase tilt-driven mistakes. Always save enough for multiple attempts before engaging with these systems.
Community data often reveals soft pity or success streak patterns, even if the game doesn’t disclose them. Use that information to time your rolls. This approach dramatically reduces the total materials needed to unlock RNG-gated units over time.
Phase Seven: Preserve Branching Units and Duplicate Copies
As covered earlier, some units serve as keys to multiple unlock paths. Never evolve your last copy of a unit without confirming it isn’t needed elsewhere. Keeping one spare base copy can save you from re-grinding entire modes later.
This is especially important for units tied to raids, secret quests, or future updates. Toilet Tower Defense frequently adds new evolutions retroactively, and having the base unit ready gives you a head start the moment new content drops.
Final Tip: Progression Is a Long Game, Not a Sprint
Unlocking every unit in Toilet Tower Defense isn’t about playing more, it’s about playing smarter. Focus your resources, respect limited-time content, and treat every upgrade as a strategic decision. If you do, you’ll build a complete collection without burning out or wasting a single grind cycle.