Trail of Cthulhu is another detective-orientated Role-playing game and is actually based on the first game on this list. Figured it out? Yes, it's based on Call of Cthulhu. Here, things are similar to the game it's based on and therefore everything is suitably atmospheric and tense. Again set in the same H.P. Lovecraft-orientated universe, unknown alien horrors are about and Gods up to no good also exist. Couple those things with cults of goons who worship those Gods and things are suitably challenging and grim for the game's heroes.
This game uses the GUMSHOE system, which is perfectly suitable for everything detective-orientated, allowing a focus on investigative approaches. It possesses many different features, like sanity measuring a character's ignorance of the real nature of reality and stability, which measure one's resilience in psychologically-taxing situations
This is similar to Call of Cthulhu in many ways, but features different scenarios, with mysteries in libraries and bloody crime scenes. Players can also patrol the mean streets of Chicago or wander through jungles in the south pacific,