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 one from Steam, Amazon or GamersGate.
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
Select your platform
Windows
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. For older versions, try the nightly or compiling it yourself.
Android (Beta)
Maintained by page / sfalexrog
Check the forum thread and wiki for further information.
ArchLinux
Maintained by Dalrik
Check this website for more details.
Debian
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
FreeBSD
Maintained by Dmitry Marakasov
Check this website for more details.
Fedora
Maintained by evgenyz
Available on Fedora’s COPR site: https://copr.fedoraproject.org/coprs/evgenyz/openxcom/
Just run sudo dnf copr enable evgenyz/openxcom && sudo dnf install openxcom on a terminal.
Gentoo
Maintained by winterheart / DarkDefender
Available in main repository as games-engines/openxcom.
Haiku
Maintained by Mikolaj “lich” Halber
Install haikuporter and run haikuporter -S openxcom.
Game data needs to be copied to /settings/OpenXcom/.
Maemo
Maintained by Siim “zod” Salonen
Available on official Maemo repositories: http://maemo.org/packages/view/openxcom
Updated with nightly and optimized for mobile/touchscreen input.
MorphOS
Maintained by Paweł ‘Stefkos’ Stefański
Check the included README for more details.
NixOS
Maintained by page
Just run nix-env -i openxcom on a terminal.
OpenBSD
Maintained by Antti Harri
In order to install in OpenBSD 5.0+ use the pkg_add command.
OpenPandora
Maintained by Canseco
Check this website for more details.
openSUSE
Maintained by Mailaender
Use the One-Click installer: http://software.opensuse.org/package/openxcom
Others
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!