Phobosguy
Unlocks Super Shotgun Model
From the Argent Cell outside in the ravine, turn around, jump over to the ledge on the left, and move right. Climb up the ledges to find a small cave. The Collectible is in the back.
Pinkguy
Unlocks Pinky Model
Head right from the maintenance room (where you used the fan to pass through the air scrubber area) and enter Prototype Lab 01 at the second door. Climb onto the equipment in the middle of the room and face right. Jump into the small shaft and follow the maintenance access until you find a Collectible. Continuing through this access drops you into the Server Room.
