 In 2003 Marvel Publishing published its own role-playing game, the "Marvel Universe Roleplaying Game", that used a diceless stone pool system.In August 2011 Margaret Weis Productions announced it was developing a tabletop role-playing game based on the Marvel universe, set for release in February 2012 using its house Cortex Plus RPG system.Video games based on Marvel characters go back to 1984 and the Atari game, "Spider-Man".