Sonic 2 in 1: Sonic 2 + Sonic Spinball © 1995 Sega Enterprises, Inc.
Two 8-bit Sonic games bundled together for the Sega Game Gear :
Sonic the Hedgehog 2 [Model 2507-50]
Sonic Spinball [Model 2526-50]
Game ID: 2568
Cartridge ID: 670-7612-50
Released in October 1995 in Europe only.