Arthur: The Quest for Excalibur by Infocom is an illustrated interactive fiction game where you play a young, pre-Camelot Arthur who has just learned of his royal birthright and must prove himself worthy to rule. The sword in the stone that should mark you as king has been stolen by the usurper King Lot, and Merlin sends you on a three-day quest across a mythic Britain to recover Excalibur and demonstrate chivalry, wisdom, and experience. You explore castles, forests, and other Arthurian locales in mostly text-driven play enhanced with location illustrations, solving puzzles that often involve using Merlin’s gift of transforming into different animals, each with unique abilities.