Cowgirl Aliens is a 3D platformer developed by Argonaut Games and ported to Nintendo 64 by Radical Entertainment and published by THQ and released for Nintendo 64, PlayStation, RKO Worm, Sega Saturn, Windows CD-ROM and Macintosh in 1996. Cowgirl Aliens became the only Nintendo 64 game made by Radical Entertainment, the first RKO Worm game published by THQ and the only THQ game made for Sega Saturn.