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.
Asylum Assignment | Walkthrough LB2 Guide
Build a platform (with hazard suit for Robin) using bricks near the entrance. Now move right, jump Robin into the water and pull the lever on the left.
In this way you will unlock electricity suit for Batman (you can move on the electrifying surfaces in it). Pass through the electrifying platform and use your suit on the receptacle (picture). Back to Robin, move right and destroy chains near platforms (they will swim out). Use them to get on the other bank of the water and use next electric machine.
Back to Robin and start heading right. After a while you will get to the fan. Destroy it and move to the corridor behind it (picture). Move right and pull the lever. Back to Batman and use another console and after that get Robin to the metal cage. Turn it using windlass built earlier by Batman.
When Robin gets to the top use his hazard suit to fill the vessel standing in front of you (picture). In this way you will lower the stairs on the left. Use them to get on the higher floor. Pull the lever on the platform (it will freeze the wall, use it to climb higher).
Move to the room on the right and destroy two valves (water starts pour out). Move to the right, destroy items near the boxes and use bricks to build platform with ice suit. Wear it and freeze the water (picture) and the wall on the background. Climb higher and jump on the other edge using freeze water from hydrants.
Use Robin to pass through ice stream from the pipe and push the windlass (you have to push the green brick). Move to the ice chamber and eliminate all enemies. After that use Batman's electricity suit to climb on top of the left ladder and use him on the receptacle (picture). Now reach the top with Robin and move him to the right using the ice wall.
Jump to the small room under you, pull the lever and push the green brick which will shows in the center of the room. Freeze the water with Robin and move Batman on the other side and activate next machine. After that get into the elevator with both heroes (picture).
In new location move to the right and eliminate enemies. Use bricks to build platform on the centre of the room and use Batman to pull the lever on the left side of the screens. Then wear Robin in acrobatic suit, make trackball and move on the platform (picture). Now you have to control the valve spot from right bottom corner to the left bottom corner.
When the container shows up fire the hook on the front side (picture). Eliminate enemies and use bricks to create platform with suit with sensors. Activate invisibility and move to the left. Pass through cameras, pull the lever, extinguish fire with Robin and move forward.
Continue march and eliminate all enemies en route. After a while you will reach the big area. Eliminate enemies, get to the green wall and use Batman's suit to scan it. Now you have to link all red mechanisms (picture). Pass through the bridge which will show on the right.
Use Robin to Freeze water on the right side (picture). Climb up on the ice wall and pull the lever which will slide out another bridge.
Pass through it and eliminate another group of enemies. Now move Batman to the high wall on the left side and scan the left top corner (picture). Press H and the battery will fall down. Now you have to set next mechanisms until battery will get to the right bottom corner.
Get upstairs and pass through the corridor with lots of enemies. When you get to the gas trap pull the lever on the left, change hero and do it the same with the lever on the right side (picture).
Move to the next location where you will have to face with Scarecrow. He will throw tanks filled with gas. Time and time again you must eliminate all enemies which will attack you (picture).
When you get rid of the smaller enemies the Scarecrow will attack you. Punch him a couple of times (picture). When he gets back to his safe position wait until he throws next gas tank and eliminate another group of opponents. Repeat it until you seriously hurt Scarecrow.
At the end of the fight you will have to use bricks to create levers on the left and right side of the chamber. Use them and the second hero will be able to jump on the platform, move him to the top and pull the lever (picture) which will activate ventilation. Repeat this with the second lever and finish off the Scarecrow in melee combat.