Shoot, upgrade, conquer enemies, defeat bosses, acquire achievements, collect gems, all in an attempt to save yourself and your gun from the clutches of the evil Professor.
Earth is being invaded by an alien race and the only chance humanity stands at defeating the alien invaders lays buried in our past. Journey back in time to exotic lands and uncover an ancient alien super weapon - mankind's survival depends on it.
A Reaper is a black ops agent with stealth capability in which he can use portals to move faster than light. But a team of Reapers has gone rogue, so you must hunt them.
Complete the combat training by engaging in DM or TDM matches on 5 beautiful and unique maps. Don't forget to unlock new equipments, gears and weapons for characters or just have a blast in the free play mode.