On which Sega console did Sonic the Hedgehog's first main game launch?

Sonic the Hedgehog’s first main game launched on the Sega Genesis, known as the Mega Drive outside North America. Sega released the platform game in 1991 as the company’s answer to Nintendo’s Mario franchise.

The game was developed and published by Sega, with Yuji Naka programming, Naoto Ohshima designing Sonic, and Hirokazu Yasuhara handling much of the level design. Its fast scrolling, loop-filled stages and distinctive music helped distinguish it from slower platform games. Sonic’s goal is to stop Doctor Robotnik from exploiting animals and collecting the Chaos Emeralds.

The regional name can cause confusion: Sega called the same 16-bit console the Genesis in North America and the Mega Drive in most other regions. The North American release arrived on June 23, 1991, while the game reached PAL territories and Japan later that year. Sega eventually bundled Sonic with Genesis consoles, helping drive hardware sales and strengthening the company’s rivalry with Nintendo during the 16-bit era. The game was later ported to many systems, but those rereleases do not change its original console debut.