A small band of engineers has been dispatched to combat the Xeno threat before it takes over all the space stations and, eventually, your homeworld. Assemble your band of engineers and fight the Xenos on each station, striving to either clear it or abandon it. You start out with a standard issue laser, but can pick up additiona weapons as you find them, including Phasers, Lightning Rifles, Poofer guns, and bombs.