Orbital Guard - space game

Orbital Guard is a free online flash game of the category space games.

Orbital Guard drops you in the hot seat of the Mars planetary defense station, shooting down wave upon wave of asteroids and alien threats. In high quality, pre-rendered isometric, defend fleeing escape pods, upgrade firepower, unlock killstreak super weapon rewards and face the final wave in this intense arcade action defense shooter.

Mouse = Aim / Fire.
Spacebar = Super Weapon.