nbayazes's Stars
sultim-t/prboom-plus-rt
sultim-t/hlsdk-xash3d
Fork of patched Half-Life SDK 2.3 from original Xash3D engine sources
pudlez/dxx-addons
Soundtracks and game mods for DXX-Rebirth and DXX-Retro
arbruijn/DXX-Retro-ar
DXX-Retro with extensions