In the original release, after reaching Shadow Moses Island, the game referenced changing the discs of the first Metal Gear Solid when you reach this same location. Otacon says: “Hold it, Snake. Time to change the disc. I know, I know, it’s a pain. But you need to swap Disc 1 for Disc 2. You see the disc labelled ‘2’?” Snake then says there isn’t a second disc, prompting Otacon to realize: “Oh, wait! We’re on PlayStation 3.”

SNAAAAAKE!!