RBDOOM-3-BFG is described as 'Is based on DOOM-3-BFG and the goal of this port is to bring DOOM-3-BFG up to the latest technology in 2021 making it closer to Doom 2016 while still remaining a DOOM 3 port regarding the gameplay' and is an app. There are four alternatives to RBDOOM-3-BFG for a variety of platforms, including Windows, Linux, Mac, Self-Hosted and Microsoft Edge apps. The best RBDOOM-3-BFG alternative is fhDOOM, which is both free and Open Source. Other great apps like RBDOOM-3-BFG are D3wasm, dhewm3 and UQE Doom 3.
Modernized DOOM3/idTech4 engine: ported to modern OpenGL (core profile), enhanced visual effects, improved performance, improved editor, more to come.
fhDOOM is the most popular Windows alternative to RBDOOM-3-BFG.
fhDOOM is the most popular Open Source & free alternative to RBDOOM-3-BFG.
D3wasm is an experiment to port the id Tech 4 engine (aka. “Doom 3 Engine”) to Emscripten / WebAssembly and WebGL, allowing to run games such as Doom 3 inside modern Web Browsers.
D3wasm is the most popular Mac, Linux & Self-Hosted alternative to RBDOOM-3-BFG.
dhewm 3 is a Doom 3 GPL source port, known to work on at least Windows, Linux, macOS and FreeBSD.
UQE Doom 3 is a source port for Doom 3 that primarily focuses on quality of life improvements such as wide-screen support.
