CatacombGL : Catacomb source port with OpenGL graphics ( https://github.com/ArnoAnsems/CatacombGL )
Doom64EX-Plus : An improved modern version of Doom64EX ( https://github.com/atsb/Doom64EX-Plus )
crl : Playtesting focused Doom engine ( https://jnechaevsky.github.io/crl/ )
dhewm3 : A Doom 3 GPL source modification. ( https://github.com/dhewm/dhewm3 )
dhewm3-d3le : Port of The Lost Missions to dhewm3 ( https://github.com/dhewm/dhewm3-sdk )
dsda-doom : Speedrunning focused fork of prboom+ with extra tooling for demos. ( https://github.com/kraflab/dsda-doom )
ecwolf : ECWolf is a port of the Wolfenstein 3D engine based of Wolf4SDL. ( https://maniacsvault.net/ecwolf/ )
iortcw : ioquake3 port of Return to Castle Wolfenstein ( https://github.com/iortcw/iortcw )
rbdoom3-bfg : Doom 3 BFG Edition with modern engine features ( https://www.moddb.com/mods/rbdoom-3-bfg )
vkQuake : Vulkan Quake port based on QuakeSpasm ( https://github.com/Novum/vkQuake )
vkQuake2 : id Software's Quake 2 v3.21 with mission packs and Vulkan support ( https://github.com/kondrak/vkQuake2 )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a gogooverlay
For Paludis use this rsync : rsync://gentoo.zugaina.org/gogooverlay-portage
If you have a problem : ycarus(-at-)zugaina.org