I am enjoying Ghouls N' Ghosts so much right now for the Mega Drive/Sega Genesis! Even though @vialli82 had mentioned this version before I believe in this thread, I just remembered it until now and have been playing it non-stop in the past few days! Perhaps not as insanely hard as the NES Ghosts N'Goblins and SNES version, but still VERY challenging! I also believe this is the Remastered version of the NES classic, so it's a completely different version from Super Ghouls and Ghosts, which makes it classic and new at the same time. Super highly recommended!