Third chapter of the Thing Thing saga: now you have a complex mission to be completed in various steps. In the first one, you have to eliminate all your enemies to reach the meeting point where you'll receive your instructions.
Arrow keys or A-W-D keys to move and jump. SHIFT or CTRL keys to run. P key to pause. And the E or 0 (number zero) key to switch weapons. S key or arrow key down to crouch. The 1-6 keys to select directly your current weapon. And use the mouse to aim and shoot.