Getting the Red Key (10)

Enter the Bank and immediately defeat the Pig Cop. Clear the area before the carpet of two Mounted Guns, another Pig Cop, and an Enforcer, as walls will open revealing active Laser Tripbombs (explosives like Pipebombs can disarm them).

Find Shrink Ray Ammo on a counter, Shotgun Shells in a booth, and a Shotgun near Laser Tripbombs.

Defeat more spawning Pig Cops and grab the Small Medikit in the right corner.

Activate the switch behind the desk to open the large door in the room.

SECRET 3: Near the roof on the right wall, where the first Pig Cop appeared, shoot a switch to open a door under the phones, revealing a Holoduke. Warning: Shooting the switch inside this secret area will close the door, trapping you.

SECRET 4: Open the painting behind the desk to find a Jetpack and two Small Medikits.

Enter the Security Room and fight three Enforcers.

Locate a Large Medikit and a desk with three switches on the back. Do not touch the three-setting switch; a Shrink Ray is behind it.

Hit all three switches behind the desk to open the main door.

Enter the Generator Room. Jump on a platform to get Protective Boots, which causes gears to reveal another room.

Enter the left (alpha) room, jump on the platform, and walk through the new door, picking up a Large Medikit if needed. You must cross acid.

Jump onto the Beta platform but do not activate the switch. Exit this area and go right to emerge in Gamma.

SECRET 5: Destroy the large red crack on the wall in Gamma to find an Atomic Health and access the beginning of the level.

Return to the Generator Room and go right to emerge in Delta. Grab the Large Medikit and jump on the platform.

Quickly jump into the hole in the wall and go up the elevator.

Fight two Pig Cops and an Enforcer on the way up.

You will find the Red Key. Activate the switch on the wall to obtain a Jetpack and Protective Boots.

Proceed to the Red Key door.