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 Use these if you wanna live on the bleeding edge or to check if a bug is obsolete.
Maintained by SupSuper
The installer is not included, so you have to copy the original Data yourself. For more details see the FAQ. Latest version is at the top and includes all previous versions:
Daniel, Mon Jul 25 12:28:08 2016
Fix endless loop when destroying base defense hangars
SupSuper, Fri Jul 22 02:29:45 2016
Fix infiltration base spawning
Warboy1982, Mon Jul 18 19:45:27 2016
Warboy1982, Mon Jul 18 19:14:56 2016
deter civilians from walking on fire, let silacoids ignore it.
Warboy1982, Mon Jul 18 19:09:46 2016
fix sick burn
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