The city is full of enemy robot patrol and needs someone to protect it. You are the last hope, the last chance to survive… Fly all over the city and fight against cyborg invasion. Your goal is to hold out as long as possible and become the mightiest robot. FEATURES: Key Fetures:Find attacker and kill him to unlock new robot defenders: each robot has its’ own weapon and force. Never stop: play the infinite game and try to hold out.6 types of robot defenders;2 types of powerful weapon;some types of enemies, which are coming in waves and become stronger.