A L I A S 3 - Your are all confused in your head. You are still half machine and half human. But your human parts are still controlling your body and your brain so try to keep the faith you had in the first two episodes, beat the machines and save the world. Standard buttons are for moving ADWS and the spacebar for shooting. Also you can use the mouse for shooting and aim.
Standard buttons are for moving ADWS and space for shooting