PHOBOS

Elevator Always loved sniping? Press the logo downstairs and step on big slab. When on top.... just take the rifle.... and don't fall down.
Redeemer Why not running upstairs instead of downstairs? Your reward will be the redeemer.
Damage Amplifier When on the roof, why not get the damage amplifier? Walk down the small stairs, get it and look for some ammo.
Shield belt When on the roof, why not get the shield belt? Walk down the small stairs, get it and look for some ammo.
Invisility and Boots Shoot the panel and enjoy the invisibility.