Sonic The Hedgehog 2 (Europe) (v1.1) represents a slight variation or update to the European release of Sonic the Hedgehog 2 for the Sega Master System. The ‘v1.1’ designation likely points to a minor bug fix or an adjustment made after the initial release, and it features the same core platforming gameplay as other versions of the game.  Released by Sega.

Sonic The Hedgehog 2 (Europe) (v1.1)

Sonic the Hedgehog 2 - Miles mode