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The Red Hood Gang red brick is in the Ace Chemicals vent and pipe room during the mission’s Follow the bears section in LEGO Batman: Legacy of the Dark Knight. Before the central mixing room, enter the vent from the glass-floor party corridor, then have Jim Gordon use his Foam Sprayer to block the green-goo leaks in the glass pipe. Repeating the blockage at the preceding pipe sends the brick to the outlet, where you can collect the Toxic Waste Red Brick.
This is an optional detour, not a story-critical objective. You can start or replay The Red Hood Gang from the Batcave computer, so missing the pipe room does not require a new game.
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The brick is hidden in a pipe room immediately before the central mixing room in Ace Chemicals. You reach it from the glass-floor party corridor in the Follow the bears section: instead of continuing along the main route, turn back and enter the vent leading off the corridor. The vent opens into the room containing a glass pipe with the Red Brick inside.
Mission guides identify this collectible as the Toxic Waste Red Brick. Video Games Chronicle’s Red Brick guide lists it under The Red Hood Gang, while All Things How’s collectible walkthrough places the puzzle in the vent room before the mixing area.
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What do you need before entering the pipe room?
You need access to the mission and Jim Gordon’s Foam Sprayer. The required character ability is supplied during the mission; the puzzle is designed around switching to Gordon and spraying the leaks in the pipe. No Ace Card, WayneTech Cache or earlier collectible is needed to make the brick appear.
If you are in another chapter, use the Batcave computer to select The Red Hood Gang. The mission is Chapter 1’s Ace Chemicals outing, in which Batman and Gordon follow teddy bears through the poisoned factory. You can choose a replay rather than restarting your entire save.
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Follow these steps in order. The important landmarks are the glass-floor party corridor, the vent, the pipe room and the central mixing room.
- Launch or replay The Red Hood Gang. Select the mission from the Batcave computer and progress into Ace Chemicals.
- Reach “Follow the bears.” Continue through the factory until the route brings you to the glass-floor party corridor. This is the corridor immediately before the central mixing room.
- Stop before the mixing room. Do not cross into the central mixing room yet. The brick is behind you relative to the forward route.
- Find the vent off the corridor. Turn back along the glass-floor area and look for the vent entrance leading into a side room. Enter it to reach the pipe room.
- Locate the glass pipe. Inside, look for the transparent pipe containing the Red Brick. Green toxic goo leaks through cracks or openings along the pipe.
- Switch to Jim Gordon. Use Gordon’s Foam Sprayer on the visible green-goo leak. The foam blocks that section and pushes the brick farther through the tube.
- Block the preceding pipe. Follow the pipe route and repeat the same action at the preceding pipe section, as indicated by the puzzle layout. The second blockage redirects the brick toward the outlet.
- Collect the brick at the outlet. Once the Toxic Waste Red Brick exits the pipe, walk over and pick it up. You can then continue toward the mixing room and the rest of the mission.
The puzzle is about controlling the goo’s path rather than breaking the pipe. Spraying the leaks in the wrong order can leave the brick sitting in an earlier section, so watch where it stops after the first foam application and then seal the preceding section to create the next push.
What if the brick does not move?
First, confirm that you are in the vent room rather than a similarly industrial-looking area of Ace Chemicals. The correct room is reached from the glass-floor party corridor and contains the transparent pipe with the brick visibly inside it.
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Next, check the character. Batman cannot substitute for Gordon in this interaction: switch to Jim Gordon and activate the Foam Sprayer at the green-goo leak. Aim at the crack or leaking section of the glass pipe, not at the brick itself or the surrounding scenery.
If the brick moves once but stops, inspect the pipe immediately before the point where it halted. The solution requires a second blockage at the preceding pipe section. Apply the foam there, then wait for the brick to travel to the outlet before leaving the room.
Finally, reload the mission checkpoint or leave and re-enter the room if the interaction appears unresponsive. The guides describe the collectible as a short environmental puzzle; it is not tied to collecting the other items in the mission.
How does this collectible fit into The Red Hood Gang?
The Red Hood Gang mission contains 11 collectibles: five Ace Cards, five WayneTech Caches and one Red Brick. Both Push Square’s mission walkthrough and All Things How list that same breakdown. The Toxic Waste brick is the single Red Brick; the ten remaining items are separate pickups.
The mission’s other collectibles are distributed along the main route and short side paths. Guides place items after the elevator, around the fan bridge and shaft, near broken bridges, in the goon room and during the later Red Hood One chase. Those locations are useful for a 100% sweep, but none is a prerequisite for opening the Toxic Waste pipe puzzle.
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For an efficient route, collect the brick when you first reach the party corridor, before entering the central mixing room. If you are cleaning up later, replay the mission and head directly to that landmark instead of following the entire level’s collectible order.
What does the Toxic Waste Red Brick unlock?
Red Bricks modify costume color schemes. The Toxic Waste pickup is therefore a customization reward rather than a new character, vehicle or story mission. Collecting it records the Red Brick in your mission progress and adds its associated color modification to the game’s collectible rewards.
GamesRadar+’s Red Brick overview treats Red Bricks as game-wide modifiers, while the mission-specific guides identify this one by the Toxic Waste name. The game has 23 Red Bricks in total, so this pickup is one entry in the broader Red Brick collection rather than the complete set.
Can you miss the brick permanently?
No. The mission can be replayed from the Batcave computer, and the pipe room is an optional detour before the central mixing room. If you continue into the mixing room or finish the chapter without collecting it, select the mission again and return to the glass-floor party corridor.
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Replay is also the practical way to finish the mission’s full 11-item set. You can concentrate on the Toxic Waste pipe first, then use the same run to collect nearby Ace Cards and WayneTech Caches, or make separate passes if you prefer to follow a guide’s route order.
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Common route mistakes to avoid
- Continuing forward too soon: The central mixing room is the next major landmark, but the vent entrance is behind you on the glass-floor party corridor.
- Searching the chase section: The Red Hood One chase contains other collectibles; the Red Brick is earlier, in the Follow the bears segment.
- Using the wrong character: Gordon’s Foam Sprayer is the tool that seals the green-goo leaks.
- Spraying only one leak: The brick needs the preceding pipe blockage as well. Watch its position and repeat the foam action at the earlier section.
- Expecting a chest or free-standing pickup: The brick starts inside a glass pipe and must be pushed to an outlet before it can be collected.
- Assuming the other ten collectibles are required: Ace Cards and WayneTech Caches are independent mission pickups; the pipe puzzle can be completed without them.
How should you plan a 100% Red Hood Gang run?
For a complete mission clear, keep the collectible categories separate in your notes: five Ace Cards, five WayneTech Caches and the one Toxic Waste Red Brick. Follow the main route until each guide’s landmark appears, then take the short detour rather than pushing past it.
The most important timing decision is the Red Brick detour. At the glass-floor party corridor, pause before the central mixing room, enter the vent and solve the pipe puzzle. After collecting it, resume the story route. Later pickups appear around the fan bridge and shaft, broken bridges, the goon room and the Red Hood One chase, so checking those landmarks prevents an unnecessary replay.
For a visual cross-check, compare the mission order in Push Square’s walkthrough with the location description in All Things How. Use the VGC Red Brick list to confirm that the item you collected is the Toxic Waste entry rather than a different chapter’s modifier.
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Why the location is easy to overlook
The level’s forward path points toward the central mixing room, while the Red Brick is placed in a side room reached by backtracking. The glass-floor corridor also makes the vent look like part of the environment rather than a required route. Remembering the sequence—party corridor, turn back, vent, pipe room—turns the search into a predictable detour.
The pipe itself provides the visual clue. Once you see the Red Brick trapped in the transparent tube and the green goo leaking through it, switch immediately to Gordon. The two foam applications are the entire mechanical solution; the challenge is recognizing the correct entrance and the order in which to block the pipe.
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Frequently Asked Questions
Do I need to collect every Ace Card and WayneTech Cache before the Red Brick counts?
No. The five Ace Cards and five WayneTech Caches are separate collectibles, and the Toxic Waste pickup can be collected on its own. A replay focused only on the vent room is enough to add the Red Brick to your mission progress.
Does the Toxic Waste Red Brick change combat or character statistics?
The documented function of Red Bricks is costume color customization. The Toxic Waste entry is described as a color-scheme modifier, not as an upgrade that increases health, damage or movement.
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What should I do if I entered the mixing room without checking the vent?
Finish or exit the mission, then select The Red Hood Gang again from the Batcave computer. Stop at the glass-floor party corridor on the replay and backtrack into the vent before proceeding.
Is the Red Hood One chase where the Toxic Waste brick is hidden?
No. The chase is a later section with its own Ace Cards and WayneTech Caches. The Toxic Waste Red Brick is earlier, during Follow the bears, in the vent room before the central mixing room.




