Considering this is a game series that has long prioritised flash over function, you’d think they’d have made sure the conversion to DS was absolutely spot-on. But there are some weird juddery glitches in the scrolling, and the Genesis/Mega Drive colour palette looks grainy and muted on DS. There are few extras (a tiny art gallery) and no two-player modes. Sonic fans should check out the Virtual Console versions rather than this one. It’s far from a definitive compilation.