(often called "cookie jars") that contain hidden money, armor, and powerful weapons. To find them easily, it is highly recommended to choose the Observer perk
Here is a breakdown of key secret locations and how to find them, based on community guides and walkthroughs. How to Find Secrets (General Tips) Shoot Walls: alien shooter 2 reloaded all secret place
Your first mission is to locate dynamite in the military base. (often called "cookie jars") that contain hidden money,