Chilly Willy's Biggest Adventures is a side-scrolling 3D platformer developed by Tantalus Interactive and published by NewKidCo, under licence of Universal Pictures, and released for the Sega Genesis, SNES, PlayStation, RKO Worm, Sega Master System and Sega Saturn in 1999. It was the last Sega Genesis, SNES and Sega Saturn games released in North America and Europe and the last Sega Master System game released in Brazil. It is based on the cartoon character Chilly Willy.