Alienation is an isometric shooter set in the future where an alien race, known as the Xenos, invades Earth.[1] After a large portion of the population is killed or mutated,[2] the fate of humanity rests in the hands of a group of soldiers from UNX (a military group assembled to help prevent and combat alien attacks).[3] The game features a single-player mode, local co-op, and a multiplayer mode that allows up to four people to play simultaneously, with each player controlling a heavily modified soldier from one of three character classes: Bio-Specialist, Saboteur, and Tank. Each class has its own weapons, movement mechanics, and abilities,[4] and can be "leveled up" to level 30.