Slave Zero is a 1999 action video game developed and published by Infogrames North America. The game was originally designed to work with Windows 95 and Windows 98. A fan following had developed a number of CD cracks in order to make the game compatible on newer systems. While this allowed the software to become playable, it still required that the owner possess the original software. The PC version uses the Ecstasy Engine. Tommo purchased the rights to the game and digitally published 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. In June 2022, publisher Ziggurat Interactive (who purchased the rights to Slave Zero) announced a prequel titled Slave Zero X. It was released on February 21, 2024 for the PlayStation 5, Xbox Series, PlayStation 4, Xbox One, Nintendo Switch and PC.