OpenXcom Extended (OXCE)

OpenXcom Extended (OXCE) is an open-source clone of the popular

UFO: Enemy Unknown (X-Com: UFO Defense in USA) videogame by Microprose,

licensed under the GPL and written in C++ / SDL.

OpenXcom Extended is a game engine required to run properly

some OpenXcom.org mods such as Pirates!, Area 51 or X-Files.