Thief: The Dark Project, or simply Thief, is a stealth-based first-person computer game and the first game in the Thief series. The game was developed by Looking Glass Studios and published by Eidos Interactive in 1998 for Windows. Set in a medieval steampunk fantasy world, Thief casts the player as a professional thief named Garrett. Unlike most first-person games at the time, the development goal of Thief was to create a "first-person sneaker", where gameplay is based on the concept of avoiding combat.
Thief was well received critically, and was one of Looking Glass Studios most commercially successful projects. The game was highly influential in the development of later stealth games, and has often been hailed as one of the greatest games of all time.