"We have several more iPhone games on the way, including three unannounced Duke Nukem games," said Miller. Prey Invasion, developed by MachineWorks Northwest, offers several hours of original touch-based shooting for $2.99. The game offers control bars for FPS-style movement, as well as a TapShoot option for more simplified shooting.

The iPhone isn't the only handheld platform Duke is jumping to following the cancellation of Duke Nukem Forever. The planned Duke Nukem Trilogy of Nintendo DS and PSP games--in development by Frontline Games--has been unaffected by 3D Realms' financial and legal woes. The first installment of the series is expected this fall.