Built by Zoltan Wacha, steampeek.hu is an excellent website that keeps track of Steam games, with the possibility for finding "similar" or "related" games along with filters like "rating" to be able to further narrow down the search. Steam itself does offer "recommendations" but arguable steampeek seems much cleaner and methodical in maintaining lists, tracking and searching for games. For example, one can start off by searching a game that is already known and then follow "similar games" to get a list with screenshots and synopsis sorted by relevance in decreasing order. It is not perfect because a lot of games are mislabeled from the start anyway (ie: "arcade" being used for something that is functionally an "RPG") but it does a much better and cleaner job than Steam.