Doom 3 based on a combination of the excellent dhewm3 and d3wasm projects, with multithreaded backend renderering from emileb, OpenGLES MultiView from DrBeef and lots of VR functionality ported by Baggyg from the excellent Fully Possessed PCVR mod
Why do you think that https://github.com/DrBeef/QuakeQuest is a good alternative to Doom3Quest