OpenXcom requires a vanilla version of the original UFO: Enemy Unknown / X-COM: UFO Defense (any edition) with the latest patch. It is not compatible with other games in the X-COM series. If you don’t own a copy, you can buy it from one of these retailers.

Do not use modded versions of X-COM, as they may be incompatible with OpenXcom.

Check the Installation documentation for more details.



These builds are automatically generated from the codebase, so they have the latest fixes and updates as well as the latest bugs. Use these if you wanna live on the bleeding edge or to check if a bug is obsolete. Do not install these on top of 1.0!

Windows Mac OS X Ubuntu / Mint

Maintained by SupSuper

The EXE version has an installer while the ZIP version is standalone. For more details see the FAQ. Latest version is at the top and includes all previous versions:

Daniel, Thu Jun 15 23:41:33 2017
Merge pull request #1154 from azamorapl/abort-cutscene

Allow different cutscenes when aborting mission
Adolfo Zamora, Wed Jun 14 20:36:22 2017
Allow different cutscenes when aborting mission

The PlayStation version of UFO plays a special cutscene when a mission is aborted. This will allow mods to map a cutscene to this particular event.

Daniel, Thu Jun 15 23:40:46 2017
Merge pull request #1148 from hartmark/vs2017-compile

Vs2017 compile
Markus Hartung, Thu Jun 15 23:02:13 2017
Fix compile errors in Visual Studio 2017

warboy1982, Thu Jun 8 00:20:29 2017
fix aliens trying to grenade airborne opponents

SupSuper, Sat Jun 3 00:15:45 2017
Fix for ufopaedia lookups modifying original article

Meridian, Sun Dec 18 12:16:42 2016
Fix for not finding a correct pedia article by ID

Mac OS X
Maintained by grrussel

Check this website for more details.

Ubuntu / Mint
Maintained by Krzysztof “Knapsu” Knapik

Available on a dedicated PPA repository. Please do the following in a terminal:

# sudo add-apt-repository ppa:knapsu/openxcom-beta
# sudo apt-get update
# sudo apt-get install openxcom