Every game should have an equivalent of The Document of MGS2 - literally everything and everything you could ever want pertaining to MGS2 is here. Things you'd expect like an extensive model viewer, concept art, and music test but it goes much deeper than that like a cutscene viewer with noclip enabled, full technical breakdowns of the game systems, the complete english script(!), Kojima's original game plan in Japanese(!!), all of the trailers including internal use test footage dating back to 1999(!!!), extensive staff interviews(!!!!), and much more, all presented in a slick package. If you like MGS2 or even just diving behind the scenes of game development you need to spend an afternoon with this.