Brash, brawny, and blonde Duke Nukem makes his PSP debut with Critical Mass, the first of a planned trilogy of Duke Nukem games from Apogee Software. Unlike the DS version's predominately side-scrolling viewpoint, Critical Mass on PSP features a third-person perspective set behind the protagonist. Blast pig cops and other alien creatures across nine futuristic locales, each consisting of three to four levels in length. An assortment of guns and offbeat weapons will become available as you progress, from pipe bombs to plasma rifles. Critical Mass also features jetpack flying sequences that have you battling other flying enemies with a deadly combination of rockets and machine guns. ~ Scott Alan Marriott, All Game Guide