What if Doom, but as a Build engine game? It even has some of the quirks you’d see in a game like Duke Nukem 3D, Shadow Warrior or Blood - it even has an approximation of Blood’s very satisfying explotion damage, currently labeled as experimental.
Sourceport: GZDoom -
Map: Shooting Range -
Mod list:
Nobody Told Me About id -
Doomworld thread:
Damnums (damage numbers) -
A Floppy Disk Full of MIDI Files -