To Run the Game: 1) Launch c4.exe 2) Select "Start New Game" at the menu 3) Choose "Zombie Crisis" from the list How to Play: The goal is to stay alive as long as you can. The clock in the upper-middle shows you the number of seconds you have survived. Since the Zombies never quite got finished, you can basically move around and look at the buildings in the current demo using the WASD keys, and the SPACE bar to jump.