The studio has also flirted with other Clancy properties over the years, including an adaptation of "Rainbow Six" (a popular spin-off of the Jack Ryan books) and also a video game franchise owned by Ubisoft. Ubisoft and the military/espionage author have enjoyed an equally fruitful relationship over the years, with Clancy universe game franchises like "Ghost Recon," "Rainbow Six," and "Splinter Cell" all being top sellers for the company. The matching of Ubisoft, Paramount, and Clancy for a "Splinter Cell" movie makes sense for all three.