The Red Hood Gang is the Chapter 1 mission set inside Ace Chemicals, where Batman and Jim Gordon trail a trail of teddy bears through a poisoned factory floor. Hidden across the level are five Ace Cards, five WayneTech Caches, and a single Red Brick that unlocks the Toxic Waste modifier for your suit colors.

Collectibles overview
The level splits into two phases. The first half follows the bears deeper into Ace Chemicals, and the second half becomes a chase sequence against Red Hood One during the factory meltdown. Every collectible sits along the main path or one short detour off it.
| Collectible | Phase | Short location |
|---|---|---|
| WayneTech Cache #1 | After the elevator | Grapple ledge, glide across the gap |
| Ace Card #1 | Follow the bears | Beside the console after the fan-bridge glide |
| WayneTech Cache #2 | Follow the bears | Right of the second broken bridge, narrow L-beam |
| Ace Card #2 | Follow the bears | Grapple two ledges up to the teddy bear tea party |
| WayneTech Cache #3 | Follow the bears | Batarang the console at the top of the fan shaft |
| Ace Card #3 | Follow the bears | On top of a pipe at the top of the fan shaft |
| WayneTech Cache #4 | Follow the bears | Left side of the room full of goons |
| Red Brick (Toxic Waste) | Follow the bears | Vent off the glass-floor party corridor |
| Ace Card #4 | Chase Red Hood One | Safety-glass room after the rocket dodge |
| WayneTech Cache #5 | Chase Red Hood One | Ladder left of the fire valve |
| Ace Card #5 | Chase Red Hood One | Small side room past the burst pipes |
WayneTech Cache locations
Cache 1. Right after the opening elevator drops, turn left and grapple up to the ledge. Follow the yellow marker and glide across the gap. The cache sits on the far platform.

Cache 2. Once you grapple past the second destroyed bridge, do not push into the next room yet. Turn right toward the balcony and step onto the narrow L-shaped beam. Have Jim Gordon seal the burst pipe with his foam gun, then crawl through the wall opening to reach the cache.
Cache 3. In the large fan chamber, ride the updraft to the top and enter the tunnel. Turn around and throw a batarang at the console to disable the fan, then drop to the bottom of the shaft. After looting the cache, hit the nearby button to reactivate the fan and continue.

Cache 4. After leaving the tunnel, you arrive on a ledge looking down on a room packed with Red Hood goons. The cache is sitting in plain view on the left side of that room.
Cache 5. During the Red Hood One chase, you reach a fire blocking the path that needs a batarang on a water valve. Before extinguishing it, turn left, climb the ladder, and pull the doorway open with the grapple. The final cache is inside.

Ace Card locations
Card 1. After building the bridge and gliding across using the fan updraft, the first card sits directly ahead next to the console.

Card 2. Grapple past the second broken bridge and head into the next room. Turn left and grapple up two ledges to find a teddy bear tea party. The card is up the stairs at the back.
Card 3. In the giant fan chamber, glide all the way to the top and enter the tunnel. The third card is resting on top of a pipe just before the vent.
Card 4. After dodging Red Hood One's rockets, you enter a room with safety glass. Turn right, and the card is propped against the door in the back corner.
Card 5. Later in the chase, Red Hood One fires another rocket and retreats. Step through the small doorway to the right of the burst pipes, and the last card is in the back of that side room.

Red Brick: Toxic Waste modifier
The Red Brick hides in a side route off the glass-floored corridor where Red Hood goons are partying below. When you reach the end of that hallway, turn right and crawl through the hole in the wall.
Step 1: Have Jim Gordon seal the first leaking pipe with the foam gun. The Red Brick is stuck inside, and plugging the leak pushes it further along the pipe.

Step 2: New breaches open as the brick moves. Keep sealing them with Gordon's foam until the brick is fired through to the next section.
Step 3: Switch to Batman, pull open the vent at the end of the room with the grapple, and follow the pipe through. Seal the final leak so the toxic waste stops pouring onto the brick, then pick it up safely.

Equipping the Toxic Waste modifier adds green chemical-style color accents to any Batsuit in the Batcave wardrobe.
If you missed something
Collectibles in Ace Chemicals stay tied to the mission itself, separate from the open-world pickups outside the plant. Head back to the Batcave computer, select The Red Hood Gang, and replay it in free play to mop up anything left behind. Any collectible already grabbed will not reappear, so you can run straight to the ones you need.