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 Use these if you wanna live on the bleeding edge or to check if a bug is obsolete.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:

SupSuper, Sun Oct 23 19:34:04 2016
Fix commendations crash

Warboy1982, Sun Oct 23 13:00:31 2016
add mod version info to saved games

SupSuper, Sun Oct 23 00:30:49 2016
Don't try to be DPI aware, we're a 90s game not a desktop application

Warboy1982, Sat Oct 22 16:32:43 2016
fix logical fallacy

poor spock.

Warboy1982, Sat Oct 22 10:06:26 2016
fix an oversight regarding line of fire

allow shooting at the tile, if possible, even if shooting at the unit
on the tile is not.

Warboy1982, Sat Oct 22 10:05:12 2016
fix goomba stomping

move or get KOed, not both.

Warboy1982, Sat Oct 22 10:04:05 2016
alter the globe flight path drawing a little

Daniel, Thu Oct 20 11:25:52 2016

Warboy1982, Wed Oct 19 20:44:33 2016
some more fixes

SupSuper, Wed Oct 19 01:45:25 2016
Fix underpowered Barracudas and SWS

SupSuper, Wed Oct 19 00:57:46 2016
Fix UFO ID showing up as 0 when redirecting craft

SupSuper, Wed Oct 19 00:57:14 2016
Fix incorrect alien base statistics

SupSuper, Tue Oct 18 23:18:54 2016
Fix TFTD transfer screen colors

SupSuper, Tue Oct 18 23:01:18 2016
Fix craft not refuelling when Elerium is recovered

SupSuper, Tue Oct 18 21:43:20 2016
Fix extra "not found" errors

Warboy1982, Tue Oct 18 21:26:53 2016
fix rtb error

Warboy1982, Tue Oct 18 10:28:57 2016
fix some dodgy LOF stuff

Warboy1982, Mon Oct 17 16:36:12 2016
fix shots fired glitch

Warboy1982, Mon Oct 17 16:29:43 2016
fix throwability

Warboy1982, Mon Oct 17 16:29:00 2016
visibility fix for bigwalls

Warboy1982, Mon Oct 17 08:05:56 2016
make pursuing fighter craft RTB when UFO is downed

SupSuper, Sun Oct 16 20:50:38 2016
Add error messages for missing mod content, this should hopefully make it easier for modders to catch typos.

Please report if you get "not found" errors incorrectly.

Warboy1982, Sun Oct 16 15:24:13 2016
attempt a fix at explosive propegation

Warboy1982, Sun Oct 16 10:54:07 2016
fix new battle hiccup

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