Crime Scene Cleaner is one of these titles that bridges the gap between your run-of-the-mill PC sim and a game and it does it very well. There's no gimmicks, you clean crime scenes. While morbid, they manage a lighthearted atmosphere helped by the smooth lighting which gleams on a freshly mopped floor, the UV lights, the object physics, and the god awful jokes. I finished it in around 14 hours but you could easily spend more, and due to how the skill tree works you could approach levels differently.

The game is reasonably priced, they released a demo beforehand, and is an all round polished game.