RiSCiSO was the game releasing arm of RiSC. A january 1998 text file announced the formation, "With the higher capacity and speed of today's internet based sites, more and more individuals are downloading CD-ISO files or CDIMAGES for use with their CD-ROM burners. Therefore, RiSC is proud to introduce our brand new division, RiSCiSO. RiSC has long lead the scene in the tradition of couriering, now with the help of our new division, we are proud to bring you the best in ISO Games and Utilities. Look for RiSCiSO on a site near you!"

The group was in the FBI's Operation Site Down raids of summer 2005. On February 1, 2006, the U.S. Attorney's Office under Fitzgerald announced that it was indicting 19 members of RiSCiSO.