Defend the Earth from hordes of alien attackers! Endless retro arcade space shooter. How long can you defend the Earth for? No Ads and no in-app purchases - just simple honest 100% free gaming! - Choose between various unique space craft - each with its advantages and disadvantages. - Various alien enemy types, which get gradually more difficult. - Switch between different weapon types. - Boss levels which get significantly harder each time. - Collect Shield, Weapon, and Health power-ups to help with the ever increasing might of the enemy. - Your shields and weapon battery recharges, but your health does not. - Global stats and leaderboards!