Getting the Blue Key (6)

From the start in Polaris Outpost, turn around and enter the Teleport Pad to acquire Steroids and an RPG.

Return through the Teleport Pad and proceed down the hallway.

SECRET 1: Immediately turn left and approach the monitor. A secret door will open opposite it, containing RPG Ammo.

In the Computer Room, you will encounter your first Trooper behind a pillar and a second at the computer station. You can find a Shotgun and a Small Medikit here. A switch near the window will lower the forcefield.

SECRET 2: If you do not destroy any computers in the Computer Room, one will remain broken, revealing a secret room with two Troopers and an Atomic Health. If you destroyed the computers, repeatedly press the Use key to find the secret door.

Proceed through the forcefield and down the hallway. Open the next door, then the one after that (which contains a Large Medikit), and enter the forcefield room. This room contains RPG Ammo and a Large Medikit.

Facing the forcefield, go to the right wall and open the door.

Enter the Storage Room, go down the ramp, and fight an Enforcer. This room contains the Blue Key, a Portable Medikit, Scuba Gear, Body Armor, and two Pistol Ammo.

Notice the lighted wall with a brown stripe. Open it to submerge into water. Following the water path will lead you to a Chaingun Cannon and Night Vision Goggles.

SECRET 3: At the end of the Storage Room, enter the vent. You will reach a dead end, requiring a jump to reach another dead end. A third jump will lead you to a small shaft containing Pipebombs. Jump out of the shaft.