Thief Gold (1999)

Thief's fan-mission scene, including The Black Parade, shows how much can be built from listening, lighting and a good burglary space. Gold's original campaign already gives those systems room to interact: a noisy floor can matter more than a better weapon. The attraction is learning a place well enough to move through it quietly. Some extra Gold missions are labyrinthine, and combat is a poor rescue plan. Start with the supplied campaign; fan-made expansions are an optional second life, not homework.