OpenXcom requires a vanilla version of the original UFO: Enemy Unknown / X-COM: UFO Defense (any DOS / Windows version) 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 one from Steam or Amazon.

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

Check the Installation documentation for more details.

Milestone buildsNightly buildsExtras


You can grab the latest releases here, just choose your platform and read the Installation instructions. Different platforms are maintained by different people, so some downloads may not have the latest changes. If you experience bugs, check if they’ve been fixed in the Nightly Builds.

Current Milestone: 0.9 · May 7, 2013 · Changelog


Maintained by SupSuper

Windows XP or later required. For older Windows versions, try the nightly builds or compiling it yourself.

Mac OS XMac OS X

Maintained by Marabus

Mac OS X 10.7.x required. For other Mac OS X versions you will have to compile it yourself.

UbuntuUbuntu / Debian

Maintained by Krzysztof Knapik

DEB packages for Debian based distributions can be downloaded from

Ubuntu users can use a dedicated PPA repository. Please do the following in a terminal:

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


Maintained by Angelos Tzotsos

In order to install in openSUSE do the following in a terminal:

# zypper -ar home_tzotsos
# zypper refresh
# zypper install openxcom

Alternatively you can use the One-Click installer:


Maintained by Antti Harri

In order to install in OpenBSD 5.0+ use the pkg_add command.


Maintained by Zoltán Mizsei

Check this website for more details.


Maintained by breed808

Check this website for more details.


Maintained by winterheart/DarkDefender

An OpenXcom ebuild is available in the gamerlay overlay, you can get it through layman -a gamerlay.


Maintained by Canseco

Check this website for more details.


Maintained by Dmitry Marakasov

Check this website for more details.


Maintained by Paweł ‘Stefkos’ Stefański

Check the included README for more details.

DingooDingoo A230 (out-of-date)

Maintained by Shin-NiL

Old version from 05/02/2012. Check this website for more details.


Maintained by SupSuper

OpenXcom is cross-platform, so if you don’t see a build for your specific platform, you can just try to compile it yourself. And if you succeed, send us your build/package/etc so we can add it here for everyone to use!