Sonic the Hedgehog is a video game series. It is published by Sega, with entries developed by Sega, Sonic Team, Traveller's Tales, Dimps, SIMS Co., Ltd., BioWare, Hardlight, Aspect, Sumo Digital, Gameloft, Gamefam Studios, Arzest, and Rovio Entertainment. The series debuted in 1991 with the video game, Sonic the Hedgehog, released for the Mega Drive video game console. In its earliest history, most Sonic the Hedgehog games had been platform games released for Sega video game consoles and handheld game consoles (handhelds), dating from the Sega Genesis to the Sega Dreamcast.