Thief: The Role Playing Game

From Introduction:

Adaptation of the “Thief” video games to Fictive Hack

This game is ideal for picaresque and Gothic fantasy, with a dash of anachronistic elemental/gearwork tech like street lights and steam-powered robots. No gunpowder, but otherwise somewhere in the transition between medieval and renaissance. This setting is twisted for anti-heroes, who appear heroic in that they oppose forces worse than themselves. Now, you are invited to join in the fun.