You can either choose between a new recuit, a soldier or a vanguard. To go on a mission, you need a strong cannon to defense yourself against the enemy. Assault have a weak but rapidly fire cannon, a ranger with a highly precision railgun, a bruiser with a cannon that can spread out to hit multile targets at once, and finally a gunner, armed with a charged gatling gun. 10 seconds of the Gatling firing can resulted in the enemy reduced to atoms Best played full screen.