Thief: The Dark Project is a first-person stealth game developed by Looking Glass Studios and published by Eidos Interactive, originally released for Windows in 1998. Players assume the role of Garrett, a cynical master thief navigating a dark, medieval-steampunk metropolis known simply as the City. Eschewing the run-and-gun conventions of contemporary first-person shooters, Thief emphasizes stealth, evasion, and careful observation. The game introduced groundbreaking mechanics such as a light gem that indicates the player's visibility to enemies, a detailed sound propagation system that allows eavesdropping and distraction, and a wide array of specialized arrows (water, moss, rope, noisemaker) for non-lethal play. Missions involve infiltrating heavily guarded locations to steal valuable artifacts, with objectives that often shift mid-mission. The narrative weaves a tale of political and supernatural intrigue, involving the fanatical Hammerite order, the pagan god known as the Trickster, and the enigmatic Viktoria. Powered by the Dark Engine (shared with System Shock 2), the game features dynamic lighting, steeped in shadow and torchlight. The 'Gold' edition, released in 1999, added three substantial missions and several tweaks. Widely praised for its innovation, atmosphere, and design, Thief established the template for the modern stealth genre and is frequently cited as one of the greatest video games ever made. Its influence echoes in series like Splinter Cell, Metal Gear Solid, and Dishonored.