Sega Game Gear, Sonic Wiki Zone

The Sega Game Gear (ゲームギア, Gēmu Gia?) is a handheld video game console manufactured by Sega. It competed with Nintendo's Game Boy. Introduced in 1990 as a portable Sega Master System, it was in production from 1990 to 1997. The game Columns came bundled in with the Game Gear, with only six games released along side the initial launch. There were twelve Sonic games released for the system that have been ported to later games released by Sega, such as Sonic Adventure DX: Director's Cut, Sonic Gems

Sonic's Ultimate Genesis Collection - Wikipedia

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Sonic the Hedgehog (1991 video game) - Wikipedia

Sonic Adventure - Wikipedia

Sonic Rush, Sonic Wiki Zone

Sonic Superstars - Wikipedia

Sonic Mania, Sonic Wiki Zone

Under Ground Zone - Sonic Wiki - Neoseeker

Bridge Zone, Sonic Wiki Zone