Blood Source Campaign
The Blood Source Campaign was a campaign that's goal was for Monolith Production's to release Blood's Source Code under a free software license. Blood is the only major Build engine game that is still closed source. The Build engine which powers Blood is released under a free software license as is other major Build games like Duke Nukem 3D and Shadow Warrior. After long years of fighting the campaign officially died in 2001. Instead the former campaigners are now rebuilding Blood on top of the free software Dark Places engine.