From OUYA Wiki
As one of earth's newest space fighter commanders, you control a choice of galactic space ships, armed with the newest weapon technology. But first you must learn to wield it, hold back the alien invasion from Earth's key strategic placements and stop the alien invasion from assisting their asteroids reach their target. Their final goal...EARTH's DESTRUCTION!
This game contains In App Purchasing, well it contains one IAP, Section 1 is free, section 2-5 and Survival mode can be yours for just $1.99!