
Taked about OpenXcom some time ago, a great open-source clone of the classic 1994 original UFO: Enemy Unknown (X-Com: UFO Defense in USA). Find out there is a mod of wh40k for OpenXcom.
For windows,linux,android and mac.

https://mod.io/g/openxcom/m/40k (mod official download page)
https://github.com/OpenXcom/OpenXcom
https://openxcom.org/forum/index.php/board,22.0.html (OXCE)
https://mod.io/g/openxcom/m/rosigma (Expand wh40k mod)
https://mod.io/g/openxcom (list of the mods)
https://mod.io/g/openxcom?tags-in=Total+Conversion (total conversion)



Download always from official websites! I took the liberty to made a mirror (windows linux only) in case official downloads are not available.
OpenXcom 40k mod
1.1 GiB - 3 downloads