Looking Glass Studios' classic first-person sneaker Thief: The Dark Project snuck onto digital distributor Good Old Games today. Unfortunately for master thief Garrett, the loud and adoring sighs PC veterans are letting out upon learning this have surely alerted every guard in the City to his presence.

GOG's DRM-free release of Thief is the Gold Edition, which packs an extra three missions. It'll run run you $9.99, and comes complete with the soundtrack, manual, and other shiny digital gubbins. Rival digital distributor has sold Thief for a fair while now, but if you've been waiting for the GOG treatment here you go.

Thief is the third Square Enix game to hit GOG, after the publisher debuted last week with Deus Ex and Hitman: Codename 47. All three of these were originally published by Eidos, who Squeenix picked up in 2009.

Square Enix has Eidos Montreal, the studio behind Deus Ex: Human Revolution, working on Thief 4. Though it's been yonks since we heard from the game, it's hard not to be a wee bit excited considering how well Human Revolution brought that classic PC series into the modern era.