OpenXcom.org and Ufopaedia.org are now being hosted by StrategyCore. You might remember them as one of the first X-COM fansites, so I guess we’ve come full circle.

Milestones Nightlies Extras A new milestone is coming soon! Use the latest nightly instead.

OpenXcom is an open-source clone of the original UFO: Enemy Unknown (X-Com: UFO Defense in USA), licensed under the GPL and written in C++ / SDL. It was originally founded by SupSuper in …

OpenXcom Data Patch Translations The OpenXcom translations are fan-maintained and update at a completely different pace from the milestone/nightly builds, so it’s impossible for us to keep them in …

2 days ago · OpenXcom Forum - IndexHaving trouble with your mod? Don't know how to get started? Ask for help here!

Milestones Nightlies Extras These builds are automatically generated from the codebase, use these to try the latest features or check if a bug is obsolete. Do not install these on top of 1.0! You may need …

2 days ago · Explore released mods for OpenXcom, including child boards and community creations, to enhance your gaming experience.

2 days ago · Explore the X-Com Files mod on OpenXcom forum, featuring discussions, updates, and insights into this popular modification.

Feb 3, 2017 · Based on OpenXcom nightly build from: 2025-12-07 (commit 4af088c) If you haven't found a download package for your platform, you can build your own directly from the source code.

Jul 4, 2024 · The Downloads page has been updated and the nightly builds (Windows and Linux!) are now generated by Github Actions. Now the build process is open for anyone to maintain, there’s a …