Alien Shooter 2 Reloaded All Secret Place -

Some secrets here are tied to the "Cigarettes" and "Stabilizer" items. One secret contains the "Prototype ET-5". Mission 5

The cold room with 24 body drawers.

For a step-by-step visual walkthrough of all 88 locations, you can refer to these detailed community resources: alien shooter 2 reloaded all secret place