Blast away waves of alien spaceships, star panzers, destroyers and space fighters before facing the big bosses.
Collect power-ups to upgrade your firepower. Use special weapons to quickly annihilate hordes of enemies.
Boost your adrenaline by killing enemies and use the powerful air strike to blitz the enemy in a torrent of destruction.
- New keyboard controls to move and fire. Use WASD to move the ship and SPACE to fire.
- OS X 10.6 or later