Alien3 is a 1993 side-scrolling shooter video game developed by Probe Software and published by LJN for the Nintendo Entertainment System. It is based on the film of the same name. The NES title is just one of four video games created to tie into the release of Alien3. Also produced were a Master System/Mega Drive game, a Game Boy game and a Super Nintendo Entertainment System game. Despite the fact all four were released under the title Alien3, gameplay actually varies quite substantially across the four titles.