Sonic the Hedgehog 4 (World) (Unl) is a platform game released for the Super Nintendo Entertainment System. While not an original title in the main Sonic series, it represents a continuation of the franchise's legacy on the SNES.  Gameplay retains core Sonic elements like fast-paced running, loop-de-loops, and collecting rings.  The 'World' designation suggests a global setting, potentially offering varied levels. 'Unl' could indicate an unlocked or unlimited feature within the game. The developer and publisher information would need further investigation to be definitively stated.

Sonic the Hedgehog 4 (World) (Unl)

Sonic the Hedgehog (SNES)