Getting the Blue Key (9)

Entrance: Start in a small room. Open the door to find a Pistol and a Large Medikit. Proceed down the hallway to a small dome containing two Enforcers and Slimer Eggs. Take the elevator and fight two Troopers; a Shotgun and a dead Pig Cop are in this room.

Building Exterior: Fight an Enforcer, two Sentry Drones, and a Trooper. A Large Medikit is located near the entrance.

Building Interior: Near the entrance, find a large computer, Body Armor, and a Freezer. To the right is a Yellow Key door with Shotgun Shells. To the left is the path to the Alpha Transport, with a Small Medikit beside it.

SECRET 1: Interact with the big computer monitor in the center of the building. A hidden nook will reveal two Atomic Health pickups. Enter the nook for the secret credit.

Alpha Transport: At the entrance to the Alpha transport cart, defeat two Troopers and collect Pipebombs. Activate the switch to bring the cart to you.

SECRET 2: Find a crack in the wall opposite the cart entrance. Inside, defeat a Trooper and collect a Devastator and two Small Medikits. Board the cart, defeat the Troopers inside, and use the switch to travel to the other side. At the destination, defeat Captains. Open a compartment near the exit for two Freezer Ammo and a Large Medikit.

Alpha Transport Corridor: Enter the doorway and follow the cavern. Enter the next doorway; retreat quickly to avoid damage from an explosion. New Enforcers are present. Find an Atomic Health in this room. Near ground level, a cave contains an Enforcer, Slimer Eggs, a Chaingun Cannon, and a Large Medikit.

Research Room: This room has many Troopers across three sections: left (most enemies), middle (few enemies), and right (one Trooper). The Chaingun Cannon is effective here. After clearing the left section, find Steroids on a counter and Shrink Ray Ammo on another. The middle section has two Shrink Ray Ammo and a Laser Tripbomb. The right section contains a Holoduke and a Portable Medikit on shelves, with Pipebombs on the floor.

SECRET 3: Near the end of the Research Room, by the water-filled canisters and the Holoduke counter, find a hidden wall section in the upper right. Open it and take the elevator. Emerge on a catwalk where Captains and Slimer Eggs await. Enter the water-filled canisters; the second from the left leads to a Shrink Ray.

Conveyor Belt: In the left portion of the room, use the conveyor belt on the right counter to progress. Avoid the crushing doors, which requires precise timing. Descend the shaft at the end.

Waste Area: Land on an acid pool and immediately fight an Octabrain. More Octabrains are located under the acid, easily dealt with using Pipebombs. Find more Pipebombs and a Small Medikit under the acid.

Examination Room: Use the elevator in the waste area to go up. A dead Pig Cop lies on a table with a Small Medikit beside it. Near a computer, find the Blue Key, Chaingun Cannon Ammo, and two Small Medikits. Upon reaching the Blue Key, a previously locked door will open, and wall compartments will release Slimers. The upper two compartments contain Body Armor and an Atomic Health. Return through the now-unlocked door and back to the Alpha Transport entrance via the cart.