Instructions
Combat the first small wave of enemies as you enter the level, then head to nearby alley. Find the lever in the corner and pull it to open the red gate.
Enter the gate and assemble the LEGO pieces inside to form a grappling platform. Use your grappling hook to reach the top and collect the LEGO canister above.
Head right toward the next street, which will be covered in green goo. Do not touch it, as the substance is toxic. Attach your grappling hook to the catwalk above and take the zipline across to safety.
Battle the henchmen you encounter on the other side of the sludge by dodging their bullets and going in close. Assemble the nearby zipline LEGO pieces and jump on to collect the demolition suit.
Equip the demolition suit and use it to plant a bomb near the truck blocking your path. Move a safe distance away before detonating it.
Continue forward and detonate the next truck you encounter, as well.
Head to the Robin suit changer near the entrance of the bank and collect the technology suit it contains. Equip the suit, then use it on the glowing panel near the gate to access a remote-controlled car.
Steer the car toward the yellow ramp leading inside the bank. Ram the three red panels on the wall to turn them green and open the main bank door.
Take Batman inside the main door of the bank to face Clayface. Attack him as many times as you can to send him running behind the metal gates. When he reappears, he'll be dragging the bank vault.
Equip the demolition suit and plant a bomb near the vault to blast it open. Clayface will then stand on top of the vault in front of the three green panels from earlier.
Target all three panels and Clayface with the Batarang, then throw it. This will take out Clayface and end the first level.