Indiana Jones and the Last Crusade: The Graphic Adventure is a graphical adventure game, originally released in 1989 (to coincide with the release of the film of the same name), published by Lucasfilm Games (now LucasArts). It was the third game to use the SCUMM engine.
Last Crusade was one of the most innovative of the LucasArts adventures. It expanded on LucasArts' traditional adventure game structure by including a flexible point system - the IQ score, or "Indy Quotient" - and by allowing the game to be completed in several different ways. The point system was similar to that of Sierra's adventure games, however when the game was restarted or restored, the total IQ of your previous game was retained. The only way to reach the maximum IQ of 800 was by finding alternative solutions to puzzles, such as fighting a guard instead of avoiding him. This countered one common criticism of adventures games, whereby since there is only one way to finish the game, they have no replay value. Some of the alternative fights, such as the one with the Zeppelin attendant, were very difficult to pass, so the maximum IQ was very difficult to acquire.