"alien shooter" runs on namco pac-land hardware, but with a video system liked that used previously on "metro-cross" and "dragon buster" (modified to vertical scrolling and a 1048 color palette) in 1995, the game was ported to sharp x68000. then released as compliation arcades in the "namco museum" series on playstation. it also appeared in "namco museum virtual arcade" on the xbox 360, and most recently as one of the games available on "pac-man pixel bash".