GameSift

Gamesift develops an "ontological discovery and search engine for video-games" that calculates a proximity score based on the written reports of the subjective player experience (the "play") rather than taxonomies or buying patterns. It is also a source of documentation of the videogame culture at large. Published paper: GameSift: building a video games search and recommendations tool based on a domain ontology (http://www.iadis.net/dl/Search_list_open.asp?code=6059