Thief: The Dark Project is a single player stealth-based game made by Looking Glass Studios for Microsoft Windows PCs and published in 1998 by Eidos Interactive. The player takes the role of Garrett, a master thief plying his trade in an unnamed city. Garrett posesses great thieving and stealth skills, including an almost preternatural ability to hide in shadows. These skills come partly from his growing up as a street urchin and from his later education with the secret society known as The Keepers. The game follows Garrett as he clashes with the powerful and embarks on a journey into the City's strange history, stirring up more than he bargained for.
The first really good stealth game set up in a really dark but amazing world. Every mission brings something new to the gameplay and thanks to how many ways there are to accomplish your goal the replayability is extreme.
While the graphics certainly aged somewhat they still look decent enough and the amazing mappers community have created enough missions for this game to keep all Thiefs occupied for a few months.