Flying Mice LLC is a company owned and operated by Clash Bowley based in Boston, United States, in the business of creating roleplaying games. Its flagship product is Starcluster, a hard space opera science-fiction setting in a cluster of 117 systems after the Earth's sun had gone supernova.
Flying Mice's first product was StarCluster. StarCluster was released at RPGNow on June 19, 2002. Excluding alternate settings, Starcluster has had over a dozen supplements, which regularly placed Flying Mice in the top 50 publishers and for years held a spot among the top 100 products of all time, and a 2nd edition was released in 2004. A third edition was released in September 2010. Fourth edition was released in June 2016, and many older settings were re-released with this system.
The StarCluster 2 System (which was used in most of its other products) was heavily influenced by BRP, and uses 'lifepath'-based character generation and percentile skill resolution, with all resolution being based on trading points between Chance of Success, Quality of Success, and Initiative. The StarCluster 3 System is currently used in all the new products (June 2009 onward) from Flying Mice. This features extreme flexibility, with loadable resolution mechanics, varying character generation, and a high focus on user customizability.
Sweet Chariot was released on March 4, 2003. It details a Starcluster world with a thick, high-pressure atmosphere with a large amount of argon in it; in fact, below 2000 meters in altitude, the air is toxic. Human settlements are on mountaintops and plateaus, and travel between them is made with steam-powered zeppelins, sailing between nations like old sailing ships above poisonous 'seas' of argon. Although released to critical acclaim, and the author has described it as his favorite game, the game has met only slow and steady sales.
Blood Games was added almost a year later, on April 3, 2004. It is a horror roleplaying game, set in the real world; however, unlike most recent horror roleplaying games, which seek to humanize or justify the monsters, the supernatural beings in Blood Games are just that: monsters. Blood Games is also unusual in that it makes religion a prime role, which is almost a taboo subject for other companies.