Gabriel Knight 3: Blood of the Sacred, Blood of the Damned is the third game in the Gabriel Knight series of point-and-click adventure games by Sierra Online. The game was designed by Jane Jensen, Gabriel Knight's creator. In a departure from the previous two entries, the score is composed by David Henry, expanding on some of original composer Robert Holmes's themes. The game also sees Tim Curry return in the role of Gabriel, although the voices of other reoccurring characters such as Grace Nakimura and Mosely have been recast. It was released in 1999 for PCs and again in 2001 as a part of Sierra's Best Seller Series.
Each installment in the Gabriel Knight series has had a significant change in graphic design, with the first featuring computer-generated, partially rotoscoped graphics and scanned comic book art, and the second being entirely in FMV. Gabriel Knight 3 is the first game in the series to be in full 3D. Released shortly after the crash of the adventure video game industry, it could not match the critical and financial success of its two predecessors, and would be the last adventure game published by Sierra.
The plot of the game concentrates on vampires (previous titles concentrated on the paranormal aspects of Voodoo, and werewolves), with the historical elements dealing with the Knights Templar, the proposed conspiracies relating to the Freemasons and The Priory of Sion as well as Jesus.
The game uses a basic point-and-click interface. A command bar appears whenever the player clicks a highlighted item with the left mouse key. The player has full control over the camera except during dialogue and prescripted sequences, and the viewpoint moves independently of the player character. Whenever the camera is a sufficient distance away, the player character teleports to a spot directly behind the camera.
The game also uses a score-system. The score indicates how much of the game's plot has the player uncovered. Certain events that are necessary to finish the game will earn the player points as well as actions that are not required to complete the game. However, if the player wishes to learn the motives of the other characters he is required to do a number of extra activities, thus prompting players to try again in order to get a better score and more out of the game's story. However, there is no reward for completing the game with a full score.