Overpriced and undercooked. The game is still good, but that's because it's the old classic Sonic games, not because of anything this collection does specifically. Mission mode is fun for what it is, and tying all four games together with a story mode is fun (the cutscenes are great, as always), but so much feels questionable, like the lack of independent Sonic 3 and Sonic & Knuckles. Largely speaking, you're better off with the various fan ports of these games.