Blood

Blood is a first-person shooter video game developed by Monolith Productions and published by GT Interactive Software. The shareware version was released for the PC on March 5, 1997, while the full version was released on May 31, 1997 in North America, and June 20, 1997 in Europe.
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.