Arrows or WASD = Move Mouse = Aim & Shoot Destroy enemy robots and bases to earn upgrade points. Find a secret lab (star with L) and step onto it to upgrade and repair your robot. Rescue hostages from the enemies. The number of hostages you need to save and enemies you need to kill is shown in the bottom menu. Destroy cars to earn points and boxes with ? to find bonuses. Clear 12 cities of the world to complete the game and save humanity.