Taking a slower approach with inspiration taken from the likes of Aliens, the Doom II conversion named Siren looks really awesome for retro FPS fans. In the original ZDoom forum post the developer ...

Any GZDoom mod I've developed that's too small to merit its own repository goes into here. All source code within, unless otherwise specified, is provided under the MIT License.

The DHTP (DOOM High-resolution Texture Project) is a community driven project that had is birth as the D2RP (Doom 2 Retexture project). That project initially had a good start, but was unfortunately ...