gbDoom3

gbDoom3 is a fork of dhewm3 with a series of modernisations, performance improvements and an emphasis on being bug-compatible with vanilla Doom 3.

This does NOT support the BFG edition of Doom 3.

This fork was created to give an overhaul to Doom 3 that the parent project isn't willing to do. Performance improvements for macOS (Intel and M1) as well as additional assembler code for such systems, removing legacy code for SSE support, making Carmack's reverse standard and reverting all config file changes to allow gbDoom3 to be a perfect drop-in replacement for Doom 3.

For all intents and purposes, this is the only Doom 3 port you need.