Like how Doom 64 was darker, creepier, slower, and more atmospheric than the classic Doom games? Then use the D64ifier to D64ify your game. Make Doom, Doom II, Final Doom, No Rest for the Living, and most other vanilla mapsets look, sound, and feel like Doom 64.
Just Load the PK3 with any Doom Iwad or FreeDoom Iwad. Is meant to be compatible with any mapset.
Load the WAD in PrBoom minimum. Works in Software render. Chocolate not Supported yet..Load with any mapset with Doom1 or D2 or Final Doom or FreeDoom...
This is the "Core" module, which handles the GUI, HUD, lighting, textures, smoke/fox effects decorative/environmental sprites, a few environmental sound...