Operation Entity is an FPS (First Person Shooting) game which is totally free and not very big.
The mission of the game is to attack an enemy communication tower, find a map and eliminate all the enemy. For this the player has a pistol and an AK-47, and must cover unknown terrain full of the enemy, and as if that weren´t enough, you only have a little ammunition.
Operation Entity doesn´t exactly have a normal ending, as the player can´t die. The difficulty levels are well designed, and the 3D object textures are well-done.