The main Sonic the Hedgehog games are platformers mostly developed by Sonic Team. The franchise has crossed over with other video game franchises in games such as Mario & Sonic, Sega All-Stars, and Super Smash Bros.
See also: Sonic the Hedgehog (film), Sonic the Hedgehog 2 (film), Sonic the Hedgehog (character), List of Sonic the Hedgehog characters, Tails (Sonic the Hedgehog), Sonic the Hedgehog 3.