Loosely based on Serious Sam: The First Encounter on PC, Serious Sam on Palm OS is a first-person shooter featuring 15 run-and-gun stages. Sam Stone hopes to improve Earth's future by teleporting to an alien-infested Ancient Egypt. Featured environments include the Valley of Kings, the Tomb of Ramses III, and the Great Pyramid, mixing indoor corridor levels with open outdoor regions. Weapons at Sam's disposal include a shotgun, sub-machine gun, rocket launcher, and a laser gun, with additional ammo available within each level. Serious Sam supports both color and grayscale displays, and features three difficulty levels. ~ Scott Alan Marriott, All Game Guide