Chapter 4: Asylum Assignment
Start by destroying the lego pieces near the elevator and reassemble them to get Robin's Hazard Suit. Use it to take out the fire. Head to the right and dive to the water. Activate the panel to the left to unlock Batman's Electricity Suit.
Use Batman to pass through the electical catwalk then drain the power from the generator and clear the underwater path for Robin. Switch to Robin and continue to the right. Destroy the debris for the blocks to float and create a footbridge for Batman.
As Batman, continue to the right then drain the generator's power again. Switch to Robin then destroy the fan blades to enter the tunnel. Head to the left first to find a mini-kit.
Continue to the right and destroy the second fan then activate the terminal. Switch back to Batman and power up the generator to open the underwater gate for Robin. Go past the gate and have Robin destroy the green machine to clear a path for Batman. Have Batman power on the generator again to open the floor panel inside the cage. Switch to Robin and float up to the opened floor panel to get inside the cage. A mini-kit is located to the far left.
Continue to the right and have Batman destroy the desk then reassemble it to become a paddle switch. Push it for Robin to continue forth. Continue to the right and let Robin return to the surface. Now aim for the blue circular switch then press B to shoot a stream of water to it. This will activate the stairway.
Continue upstairs and power on the switch to freeze the waterfall. Climb up then defeat all goons. Destroy the shining blocks in the upper right portion of the floor and reassemble it to get Robin's Ice Suit. Destroy the two valves to create a fountain. Freeze them and the waterfall in the middle to gain access to the upper floor.
Make your way to the other side and past the freeze jet then use the paddle switch to power off the jet and create a safe passage for Batman. Continue forth and defeat the goons. Have Batman power off the generator in the upper left then control Robin and cross the frozen wall. Continue to the right and a hatch will open. Jump down then pull the lever.
Use the paddle switch to turn off the freeze jets. Have Robin shoot the waterfall with his ice cannon to freeze again then make Batman reach the other side to access the electrified terminal. (You can ignore the mini-kit during your first time in this stage) Power it off then step on the two buttons to continue.
In the next area, head to the right and defeat the minions. Switch to Robin's Acrobat Suit and swing on the handle bars to reach a mini-kit.
Power up the switch to the left of the giant monitors then use Robin's Acrobat Suit's gyro ball ability to control the conveyor belts. After completing the simple path, the box will appear. Use your grappling hook to pull the box open. Defeat the enemies that will appear as well.
Reconstruct it then change to Batman's Sensor Suit. Go on stealth mode and go past the security cameras. Deactivate them using the nearby switch, then change to Robin's Hazard Suit to put out the fire. Change to Robin's Ice Suit before moving on. Continue forth then examine the green wall and fix the alignment of the conduits inside.
Cross the bridge then freeze the waterfall to access the terminal. Activate it to create another bridge. Move along to reach the large door. Defeat all the enemies then scan the blue wall. First, release the batter in the top left corner then operate the mechanisms until the battery reaches to the lower right. This opens the large security door and stairs.
Continue along the main corridor where more prisoners will break free and attack you. Defeat them until you reach the some toxic sprays. Pull down the lever to the left and activate the terminal to the right to get past them. Meet up with the Scarecrow to start the boss battle for this stage.
Have Batman go on stealth mode and just defeat the prisoners and attack Scarecrow until he's down to 3 hearts. You should see some bouncing lego pieces from both sides. Reassemble them to become valves. Activate the valve and have one of your characters hang on the bar. Activate the valve again to retract it so the hanging character can jump on the ledge and activate the terminal there. Do this for both sides and you should be able to attack the Scarecrow normally until he's defeated. The stage is completed after his defeat.
You can now activate remote bat terminals which will allow you to fast travel to major known locations, reveal villain locations and select the vehicles you want to ride as well. Activating some bat terminals reveal the location of villains. Defeating them will allow you to buy them so you can switch to them and use their skills whenever needed.
Remote terminals are marked by red beams in the sky. For tips on how to find and collect these character tokens, please refer to this guide's Character Tokens section.
Mission 3: Arkham Asylum Antics
1: Blow up the large silver statue with the Powersuit that is built from the statue’s top hat.
2: Near the center of the labyrinth, where you receive the Wingsuit for Batman, shatter the glass wall that is covering a hole in the wall to find the kit.
3: Use Superman or Powersuit Batman to pull the orange handle where Bane’s mole machine is roaming around to open a hole in a wall, revealing the kit.
4: Use Lex on the statue near the spikes to form a lever. Pull it to reveal glass that you can then use Man-Bat to shatter.
5: Turn the gears in the far corner to open the gate below them. Hop down to the ground and go through the opening with Killer Croc or Aquaman.
6: Use Superman to freeze and then destroy the 5 fountains within the labyrinth.
7: Near the center of the maze there will be a white floor grate. Pull two levers and then use Cyborg to pull the magnetic box below out of the way. When you have cleared it, hop down under the grate and get the kit.
8: Have Lex deconstruct the door to the south and then have Superman melt the two gold wall plates. Next have Green Lantern put together the pieces which will roll a bowling ball and reveal a kit at the end of the corridor.
9: Near Robin’s acrobat suit to the southeast, use Lex to go through the barred gate. Next, use Poison Ivy in the southeast corner to go underground to a room to the east. Then use Joker on the electricity. Go back with Poison Ivy and smash the container on the wall to free the kit.
10: to the far west of the maze, there will be 4 gold flowers. Melt them with Superman and then go through the water with Killer Croc or Aquaman. Once on the far side, melt the wall statues with Superman and then use the left and right buttons to move the ball through the maze. When it drops, smash the vines to receive the final kit.
Mission 4: Asylum Assignment
1: Near the start of the mission, when Robin goes through the fans underwater, go to the left after entering the first fan to find the kit.
2: Use Superman or a flying character to fly over Killer Croc’s pen and grab the kit that is inside it on the left side.
3: For this kit, you will need to use either Killer Croc or Aquaman to pull the gold handle on the blockage at the end of the underwater corridor.
4: Just after the previous kit, climb the stairs and then hop over the railing. Use The Joker on the crate and build the lever. Pull it to raise the platform and grab the kit there.
5: To the far left, just after the previous kit, there will be a magnetic lock on a door. Use Cyborg to open it and then Green Lantern to put the pieces together. Hop through the hole that is made to collect the kit.
6: When you reach Mister Freeze’s cell, you will see a silver igloo to the far right. Use Penguin to place a bomb goon through the opening and it will travel to inside where Mister Freeze is. Once the window blows open, hop through and get the kit that is in the corner against the ceiling.
7: Use Robin to swing along the poles that are above the TV screens to grab the floating kit that is off to the right.
8: Once you pass the x-ray room, hop off the ledge – towards you, and you will find a door that Lex Luthor needs to open. Deconstruct it and enter to find the kit in there.
9: Fly north from the x-ray spot to find a patch of flowers that you will need Poison Ivy to dive into. Enter the green house to find the kit inside there.
10: There are 5 Joker faces that are painted on the walls. To clean them off and reveal the next kit, you will need to use Aquaman. Spray water at each one until it disappears and the kit will pop up.