#1) At the beginning, you will reach the flooded area. There is a corridor on the left side of the stairs leading to the secret area with a Steroids Pack.
#2) First time you cross the bridge and fight with Berserker, there is a room on your left with a Ripper Guard inside. There is a red botton between panels which reveals alcove with a Chainfist.
#3) In the room to System Access (to disable Red forcefield), a glass panel on your right is sparking. Shoot it and reveal secret area with Combat Armor and bunch of Armor Shards.
