Following the GZDoom port of Doom 64, BD-64 revitalizes the old Doom 64 with new special effects, particles, lightning, gore, new sounds, more weapon animations (shotgun reloads, smoother minigun barrels, etc.) and monsters and stuff cut from the original Nintendo 64 version. Works on GZDoom and Zandronum in OpenGL mode. (Zdoom and Zandronum Software mode are not supported.) No downloads available yet. Mod still is very early WIP.
V1.1 patch is coming up this week.
Along the lots of bugfixes and improvements, zombies and imps will feature head hitboxes. Did you miss exploding zombie heads with a shotgun?