The city is going real chaos which staged the invading alien robots. No one but our heroes will not be able to stop them. Among those turned Rigby. He picked up a gun and went to destroy all enemy robots in a row. Use your shooting skills to hit targets at a distance, do not let them get too close, otherwise they will hurt you. If this occurs look for kits that can fall out of robots. You can also find weapons, ammo and other useful power-ups to make it easier to cope with this scourge.