Indiana Jones and the Last Crusade: The Graphic Adventure is a graphical adventure game, originally released in 1989, published by Lucasfilm Games (now LucasArts). It was the third game to use the SCUMM engine.
The plot closely follows, and expands upon, the film of the same name on which it was based. Jones just returns from the reclaim of the Cross of Coronado when he is approached by Walter Donovan who tells him about the Holy Grail and the loss of his father.
Indy then travels to some of the places seen in the movie, like Venice and the catacombs after he met Elsa Schneider. In the process he finds his father held captive in the Brunwald Castle after passing through the mazelike corridors, fighting and avoiding guards. Then Elsa's double role is revealed and steals the Grail Diary from Indy. After escaping, father and son pass through Berlin to reclaim the Diary and have a brief meeting with Hitler.