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The most complete player-reported cheat list for Cosmobreeder Yiffai contains seven main codes: half enemy damage, shorter attack delay, half PSY cost, double enemy damage, hit knockback immunity, no falling debris in unstable areas, and no LECT spent when buying items. A Steam discussion also reports a double-jump code, an infinite-PSY code, and a conditional “Cosmo Pro” unlock, but those additional entries have weaker verification.
Pet bonuses are likewise community-reported rather than taken from an official stat table. The list includes Luck, Strength, Constitution, Attack and Defense bonuses, plus idle PSY or health recovery. Treat every code and buff below as version-sensitive, back up a save before experimenting, and check the current Steam listing for availability and updates.
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What is confirmed about Cosmobreeder Yiffai cheats?
No official developer cheat catalogue or official pet-stat table was located. The main list comes from a Steam Community discussion dated April 26, 2025; a later comment in that same thread adds more codes and an unlock route. The pet effects come from a secondary reference that attributes its entries to PhinixTheFox. These are useful leads from players, not independently tested guarantees for every current build.
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Main player-reported cheat codes
The Steam poster says these seven cheats do not affect achievements. That is the poster’s claim, not an official achievement-policy statement from the developer or Steam. Enter each string exactly as shown in the source; the discussion does not establish whether spaces, lower-case input or a particular menu path are accepted.
| Code | Reported effect | Practical use |
|---|---|---|
AXVAAAAG |
Take half damage from enemy attacks | Useful when learning enemy patterns or crossing a dangerous room. |
IEEUIPGA |
Less delay after each attack | Shortens the recovery or waiting period between attacks, according to the report. |
AZVTNLAG |
Spend half the PSY on Esper powers | Lets an Esper-focused build cast more often before its PSY reserve is exhausted. |
AGXTTPAZ |
Deal twice as much damage to enemies | Speeds up fights and can reduce the number of attack cycles required. |
AAUKVGGA |
Do not get knocked around when enemies hit you | Preserves positioning when contact would otherwise push the player backward. |
LEEEUYPA |
Stop random debris falling in unstable areas | Removes the reported random-debris hazard in those areas. |
GZUTZPAX |
Do not use up LECT when buying items | Allows purchases without reducing the LECT balance, if the report applies to your build. |
These effects are descriptions of what the Steam poster says each code does, not measured percentages from a developer specification. “Half,” “twice” and “less delay” should therefore be read as reported behavior rather than a promise that every patch implements the same calculation.
Additional codes and the reported Cosmo Pro unlock
Double jump: SXUXYGAX
A later commenter reports SXUXYGAX as a double-jump code. The same comment warns that activating it can cause bugs if the extra movement lets you reach areas before the intended progression. Another commenter says the code is found through a hidden shop in Zeronia-East, column 1, row 6. Their route goes through a ceiling and requires the feral form.
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Because this information comes from comments rather than an official map or code list, do not assume the shop location, form requirement or code will be identical in every version. If you use the code, keep a backup save from before activation and avoid opening sequence-sensitive areas until you are ready to accept possible progression problems.
Infinite PSY: GZKYLGOY
Another commenter reports GZKYLGOY for infinite PSY. The comment does not provide an official description of how the effect is implemented or a version number. It is therefore less firmly documented than the seven codes in the original post. Test it in a low-risk room and verify that your PSY display behaves as expected before relying on it for a long section.
“Cosmo Pro” code
The discussion includes a player-reported unlock condition for a code referred to as “Cosmo Pro”: beat Chapters 1 and 2 without consumables, then reach the transition corridor to Chapter 3. The post does not supply an official name for the code string itself. Treat this as a challenge route reported by a player, not a guaranteed unlock requirement. If you attempt it, define “without consumables” conservatively and keep a separate save so an unrecognized item use does not invalidate your normal run.
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How to try a code safely
The available reports list strings and effects but do not document one universal, developer-provided entry procedure. That means it would be misleading to promise a specific menu path. Use the following process to avoid turning an unverified code into a damaged save:
- Check your build. Note the platform and current game version shown by Steam. Code behavior can change after an update, and the reports do not promise compatibility with every release.
- Make a separate save. Preserve a normal progression file before testing movement, damage or resource cheats. This is especially important for the reported double-jump code because the commenter warns about early access and bugs.
- Find the game’s own code-entry point. Use any cheat, secret or code screen exposed by your current build. The cited discussion does not establish a universal location, so do not assume a menu name that is absent from your version.
- Copy one code exactly. Start with one entry from the main table rather than stacking several effects. The strings are shown in uppercase; copy the characters without adding spaces or punctuation.
- Test the claimed effect immediately. For example, observe damage from a safe enemy, check the PSY cost of one Esper power, or make a low-value purchase before spending important resources.
- Record what happened. Note the version, save slot and observed effect. If nothing changes, disable the code and try the version’s documented input method rather than repeatedly entering random variations.
- Restore the backup if progression becomes abnormal. A movement cheat that skips a trigger or places you in an unfinished area can be harder to repair than simply returning to the pre-cheat save.
Do the cheats disable achievements?
The original Steam discussion says the listed cheats do not affect achievements. That statement is useful evidence of the poster’s experience, but it is not an official policy and does not cover every later code or every future update. The double-jump, infinite-PSY and Cosmo Pro reports were added in comments and should not automatically be treated as covered by the seven-code claim.
If an achievement matters to you, make a clean save before activating any code, finish the achievement objective on that copy, and check the achievement status afterward. Do not treat the absence of an immediate warning as proof that all builds handle cheats identically.
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Reported Cosmobreeder Yiffai pet buffs
The following effects are attributed to PhinixTheFox by a secondary cheat reference. No official pet-stat table was located, so the numbers and behaviors should be labeled as reported buffs rather than guaranteed mechanics.
| Pet | Reported buff | What that means in play |
|---|---|---|
| Squeaker | +5 Luck | A flat Luck increase is reported; the source does not define how Luck is calculated. |
| Swiper | +7 Strength | Reportedly raises Strength by seven points. |
| Barker | +7 Constitution | Reportedly raises Constitution by seven points. |
| Kobold | +12 Luck | Offers a larger reported Luck increase than Squeaker. |
| Dwarf | +3 Attack | Reportedly adds three Attack points. |
| Wyvern | +3 Defense | Reportedly adds three Defense points. |
| Elf | Restores PSY while the player is idle | The reference describes regeneration during inactivity, without stating its rate or whether it works in every area. |
| Omegobin | +20 Luck | The largest Luck value in this reported list. |
| Bigbold | Restores health while the player is idle | The reference reports idle healing but does not state the amount or interval. |
Choosing a pet from the reported effects
Use the table as a build-planning aid, not as a substitute for an in-game stat screen. If you want the largest reported Luck bonus, Omegobin is listed at +20, followed by Kobold at +12 and Squeaker at +5. A Strength-oriented setup would point toward Swiper, while Barker is the reported Constitution option. Dwarf and Wyvern are the only entries tied directly to Attack and Defense.
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Elf and Bigbold are different from the flat-stat pets: their reported value is tied to idling. That makes them potentially useful when you can safely pause between encounters, but the source does not establish a regeneration rate, a cap, or whether “idle” means standing still in every game state. Confirm the behavior in a safe room before planning a route around it.
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Troubleshooting when a code or buff does not work
The input is rejected or nothing changes
- Recheck every character in the string; the codes contain similar-looking letters and no separators.
- Confirm that you are using the game’s current code or secret interface rather than a different input screen.
- Check for a game update. The Steam reports are dated or undated community posts, not compatibility notes for all later versions.
- Remove other active cheats and retest one effect at a time so you can identify conflicts.
The effect works, but progression breaks
Movement and area-affecting cheats carry the greatest reported risk. The double-jump commenter specifically warns about entering places early. Reload the clean save, leave the code off, and follow the intended route before trying it again. Do not overwrite the backup until you have completed the section that could contain a skipped trigger.
A pet appears to have no visible bonus
Flat stat changes may not produce an obvious animation or message, and the secondary reference does not describe an in-game confirmation screen. Compare the relevant stat before and after equipping the pet if your build displays it. For Elf or Bigbold, remain idle in a safe location long enough to observe PSY or health changes, while remembering that the reported source gives no rate or timing.
Steam availability and controller setup
The current Steam game page is the right place to check availability, regional pricing and the version you will actually run: Steam game page. A crawled community listing displayed $14.99, but that was a dated snapshot and may have reflected a region or promotion; do not treat it as a permanent price.
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For adjacent walkthrough material, the Steam guides index includes player-created guides covering cheat codes, secrets and glitches, item locations, Cosmo Cards, achievements, creatures and a late-game area: Steam guides index. Guide presence shows that community material exists, but it does not independently verify each guide’s instructions.
Source links for the reported codes and buffs
The seven main codes, the later double-jump and infinite-PSY comments, and the reported Cosmo Pro condition appear in this Steam discussion: Steam cheat-code discussion. The pet list is reproduced from the secondary reference that attributes the entries to PhinixTheFox: reported pet-buff reference. Both sources are community or secondary material, so recheck behavior after updates and keep a clean save for achievement or progression runs.
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