Aliens Online is a 1998 massively multiplayer online first-person shooter video game developed by Mythic Entertainment and Kesmai Corporation and published by Fox Interactive for PC. It was released through the GameStorm subscription service, and ran off a modified version of Mythic's engine for the online first-person shooter Rolemaster: Magestorm. Teamplay was heavily encouraged, and later versions added co-operative missions and goals for each side.