Sonic 1 and 2 is likely a ROM hack or compilation of the first two Sonic the Hedgehog games for the Sega Genesis. Both games, released by Sega in 1991 and 1992 respectively, are iconic titles in gaming history, known for their innovative gameplay and world-building. This combined version could offer players a convenient way to experience both titles together, although it is unofficial and created by fans.

Sonic 1 and 2

Sonic 1 - YOLO Edition