Slave Zero is a 1999 action video game developed by Accolade and published by Infogrames Entertainment, SA. The game was originally designed to work with Windows 95 and Windows 98. A fan following has developed a number of CD cracks in order to make the game compatible on newer systems. While this allows the software to become playable, it still requires that the owner possess the original software. The PC version uses the Ecstasy Engine.Tommo_Inc. purchased the rights to this game and digitally publishes it through its Retroism] brand in 2015. On March 25, 2014, Retroism re-released the game on GOG.com and, together with Night Dive Studios, to Steam