Sonic Hedgehog 11 is a Sonic The Hedgehog 2 bootleg for Sega Mega Drive, it's known for it's mythical status and for the fact bootlegs built on original Sonic games are very sparse. For a long time, the only proofs of existence were posts on (now dead) forums made by people that go under "ScorchXX" and "JDP". The forums became defunct and everyone just forgot about SH11, despite the enthusiasm that was previously present around it.