Navigate your character using the WASD keys to traverse the endless backrooms corridors. Target at hazmat soldiers with your controller and fire using the trigger to eliminate enemies. Pick up ammo and health packs scattered throughout the levels to boost your health. Discover the exit on each level to move forward and unlock new weapons. Endure the assault by dodging enemy attacks and smartly using cover. Improve your weapons between levels to boost your chances of survival in more challenging environments.