Both pc and mobile compatible (pc is highly recommended) Controls: pc: WASD or arrow keys - movement Space or tap - shoot mobile: Tap - shoot joystick - move (facing behind) auto - automatically shoots As you progress, the waves of viruses get harder. Upgrade cards spawn after finishing a wave. The save file is corrupted by viruses. You're an antivirus trying to CONTROL and exterminate them all. Good Luck.