Orbital Guard Survival - action game

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

Man the cannons of the mars planetary defense station - blast away incoming alien ships and asteroids - how long can you survive?

Mouse - Aim/Fire Spacebar - Superweapon

A context menu should be shown when right-clicking or, on touch devices, long-pressing in the game. This menu especially allows to play in full screen and control the volume.