Blood is a 3D video game developed by Monolith Productions and published by GT Interactive Software and it was developed using Ken Silverman’s Build engine. The game follows the story of Caleb, an undead early 20th century gunslinger seeking revenge against the dark god Tchernobog. It features a number of occult and horror themes. Blood includes large amounts of graphic violence, a large arsenal of weapons ranging from the standard to the bizarre, and numerous enemies and bosses. This is the One Unit Whole Blood version, including all the expansions of the game. The save file is interoperable with the CD version.