Sonic Gameworld happened in 1994.
Sonic Gameworld was created in 1994.
Sonic the Hedgehog Gameworld - 1994 VG is rated/received certificates of: USA:E
Sonic Gameworld was released in Japan in (August) 1994, it was released in north America in (November) 1996 but it was never released in Europe.
Sonic Rush happened in 2005.
Sonic Advance happened in 2001.
Sonic Unleashed happened in 360.
Sonic Heroes happened in 2003.
Sonic R happened in 1997.
Sonic Colors happened in 2010.
Sonic Generations happened in 2011.
Sonic Jam happened in 1997.
Sonic Battle happened in 2003.