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.



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.

Current Milestone: 1.0 · June 13, 2014 · Changelog

Windows Mac OS X Linux Android Ubuntu / Mint Debian ArchLinux FreeBSD Fedora Gentoo Haiku Maemo MorphOS NixOS OpenBSD OpenPandora openSUSE Others

Select your platform

Maintained by SupSuper

Windows XP SP3 or later required. For older versions, try the nightly or compiling it yourself.
The installer automatically detects Steam X-COM and 32-bit/64-bit Windows and installs appropriately.

Mac OS X
Maintainer required

Mac OS X 10.7 Lion or later required.

NOTE: If you experience missing text or text corruption issues in newer OS X versions, try the nightly or compiling it yourself.

Maintained by Krzysztof “Knapsu” Knapik

Download AppImage file, make it executable, and run. No need to install.
You can read more about the AppImage format here:

Android (Beta)
Maintained by page / sfalexrog

Check the forum thread and wiki for further information.

Maintained by Dalrik

Check this website for more details.

Maintained by Krzysztof “Knapsu” Knapik

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
# sudo apt-get update
# sudo apt-get install openxcom

Maintained by Dmitry Marakasov

Check this website for more details.

Maintained by evgenyz

Available on Fedora’s COPR site:
Just run sudo dnf copr enable evgenyz/openxcom && sudo dnf install openxcom on a terminal.

Maintained by winterheart / DarkDefender

Available in main repository as games-engines/openxcom.

Maintained by Mikolaj “lich” Halber

Install haikuporter and run haikuporter -S openxcom.

Game data needs to be copied to /settings/OpenXcom/.

Maintained by Siim “zod” Salonen

Available on official Maemo repositories:
Updated with nightly and optimized for mobile/touchscreen input.

Maintained by Paweł ‘Stefkos’ Stefański

Check the included README for more details.

Maintained by page

Just run nix-env -i openxcom on a terminal.

Maintained by Antti Harri

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

Maintained by Canseco

Check this website for more details.

Maintained by Mailaender

Use the One-Click installer:

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!