Sonic 3 - Fighter Sonic (Unl) is likely a fan-made, unauthorized creation based on the Sonic the Hedgehog series. The 'Fighter' aspect suggests this adaptation might focus on combat or fighting elements, departing from traditional Sonic platforming.  The 'Unl' likely implies an unlocked or unlimited version of the game, possibly with added features.  The creation involves ROM hacking and modifications, and thus it's a non-official title.

Sonic 3 - Fighter Sonic (Unl)

Snood 2 - Snoods On Vacation (U)(Sir VG)