Believe it or not, there will be at least two Duke Nukem games coming out this year, not counting the perennially delayed Duke Nukem Forever. Apogee Software--which is now a completely separate entity from 3D Realms--has PSP and DS adventures lined up for the tough as granite game icon, and Gamespot managed to get some hands-on time with both today.
Duke Nukem Trilogy: Critical Mass is the first of three planned games for the DS and PSP, and while they may share the same name and some story details, the two are completely different beasts. While they know only a little of the story so far, they do know that Duke somehow finds himself responsible for the destruction of the entire world (with a little help from aliens, of course). The misogynistic tough guy now has to set things right, travelling back and forth in time throughout the course of his new three game adventure in an effort to foil the evil aliens' plans.