STRAIN is a 32-level partial conversion released in 1997 by the Alpha Dog Alliance. It features nine new or modified monsters through the use of DeHackEd, and a soundtrack written by David "Tolwyn" Shaw, Mark Klem, and Jon Landis.
Now Demon Lord bleeds red when dying, same as when sustaining a shot.
Even in sourceports fixing the blood colors (like Crispy Doom making Hell Nobles' blood green, Cacodemons' blue, Spectres' transparent, and Lost Souls...
Deathmatch maps for STRAIN by its creators, Alpha Dog Alliance.