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There are 11 Collectibles in Ace Chemicals and the Factory Meltdown sequence in Lego Batman Legacy of the Dark Knight: five Ace Cards and Waynetech Caches, plus a Red Brick hidden near the level's midpoint. There's a strong variation in this level as to how well these collectibles are hidden, with some directly out in the open, and others locked behind puzzles in concealed rooms, but we've got a full walkthrough laid out here on everything you need to get in Ace Chemicals and how to find it.
For more guides on hidden objects, check out our page on all the Lego Batman Legacy of the Dark Knight Iceberg Lounge collectibles!
All collectibles in Ace Chemicals in Lego Batman Legacy of the Dark Knight
All the Ace Cards, Waynetech Caches and Red Bricks in the Ace Chemicals level are laid out below, in the order that you can encounter them, with more detail on each one below.
- Waynetech Cache 1: When told to cross the large gap, turn around and rappel up to the ledge behind you, then glide over a pool of chemicals to find a cache.
- Ace Card 1: After crossing the gap, the first card is right ahead of you, on the left of the computer terminal where two enemies are at.
- Waynetech Cache 2: Further on, cross the beam to the right of the door. There'll be a pipe that Gordon needs to block with foam, and a vent next to it that leads to a cache.
- Ace Card 2: Before you break the spinning fan, rappel up the ledges behind you to find the next card.
- Waynetech Cache 3: In the huge air vent where the fan makes you float, glide up and then Batarang the button behind you to shut the air down, allowing you to drop to the bottom for a third cache.
- Ace Card 3: After leaving the air vent, the next card is resting on a high pipe directly ahead of you.
- Waynetech Cache 4: The next one is in a room full of enemies, simply against the back wall on the left side of the huge mixing tank.
- Red Brick: Before going through the door to the central mixing room, turn around to see a vent on your left. Crawl through and clog the spillages in the glass pipe to push the Red Brick to the opening.
- Ace Card 4: When chasing Red Hood One, you'll hit a point where you need to raise an elevator. Look at the back corner of the wall to see a partly concealed card.
- Waynetech Cache 5: When you hit the pipe spilling water, look left to see a ladder. Up there is a door that needs the Batclaw, with a Cache beyond.
- Ace Card 5: When you reach the pipes that need to be blocked to blow the platforms up, look to their right to see a dead end behind them with the last card.
Waynetech Cache 1
After descending a large elevator, you'll be told to cross a gap ahead of you. Before you do, turn around and you should see a perch point on the right. Rappel up and onto the ledge next to it, then glide over the chemical pool to the platform across, where you'll find the first cache.
Ace Card 1
After you glide over the gap, there'll be a terminal in front of you with two goons ready for stealth takedowns. On their left, next to the terminal, is the first Ace Card.
Waynetech Cache 2
Later on, you'll reach a couple of locked doors. Next to the rightmost door is a metal beam you can balance across, with a spilling pipe at the end. Have Gordon block the pipe, then crawl through the now accessible vent to reach a Cache.
Ace Card 2
When you reach a large fan that blocks the path ahead and needs to be pulled down, first look behind you. Along the back wall is a ridge you can rappel up to, and then again, to a series of teddy bears having a picnic. Behind them is an Ace Card.
Waynetech Cache 3
In the huge air tunnel that lets you glide upwards, ride the air current to the top, then immediately turn around. Back in the tunnel is a button you can trigger with a Batarang to shut down the air. Hit it, then drop to the bottom to get a Cache.
Ace Card 3
Back at the top of the tunnel, just ahead of you is a pipe near the ceiling, with an Ace Card resting on it.
Waynetech Cache 4
This is an easy one – in the large room ahead full of enemies and perch points, the balcony to the left of the huge tank has a Cache at the end of it.
Red Brick
Just before you hit the door to the central mixing chamber that requires both characters to open, turn around to see a vent on your left. Crawl through that, and you'll see a Red Brick inside a glass pipe with multiple spill points. Use Gordon's Foam to block the spillages, causing the chemicals to push the Red Brick to the end and out of the pipe, and get the Toxic Waste modifier for your costumes.
Ace Card 4
When chasing Red Hood One through the Factory Meltdown sequence, when you reach a room where you need to throw a Batarang to raise an elevator, look on the corner to the right of the button to see the card behind some barrels.
Waynetech Cache 5
When you reach a pipe that's flooding the path ahead with water, look to the left to see a ladder. Climb to the top and use the Batclaw on the door ahead, and behind it is the level's last Cache.
Ace Card 5
Near the end, there's a pair of platforms you need to blow into the air by interacting with two different pipes, as shown above.
Ignore them for now, and simply walk to the right and behind the pipes to find a small storage bay with the last Ace Card.
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