If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Radiation: The War Begins
Z/C - Strafe.
Arrow keys - To move.
Huge waves of ugly zombies and mutants surround you in this 3D first person shooter up game, and you must survive before the reinforcement comes in, do you have the skills to complete the game and destroy all the enemies?!