NBlood is a Blood port based on EDuke32.
Highlights:
* High accuracy. NBlood can play 1.21 internal demos accurately
* Multiplayer(not quite stable atm)
* Software & OpenGL(polymost) renderers are available
* CD audio, accurate FM OPL3(SB/AdLib) emulation
* DEF/HRP support

NOTE: To play Blood with NBlood you need the original game files
from your GOG/CD-ROM installation of the game.
You should put them under '~/.config/nblood/'.