Triphids is an arcade-like space shooter for the iPhone and iPod Touch. The game features an "Arcade" mode and a "Perpetual" mode. In both modes of this game, you are a space ship around a fixed circle, shooting flashing pixels at aliens, who are shooting back at you. Your ship fires much faster than theirs, as long as the gun doesn't overheat. If the gun overheats, the pixilated bullets will come out much slower, but it will not directly affect the survival of your ship.