Indiana Jones and the Last Crusade: The Graphic Adventure

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 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. (wikipedia.org)