What's better than getting to play Metal Gear Solid 3: Snake Eater in HD? How about getting the enhanced version, Metal Gear Solid 3: Subsistence?
Metal Gear mastermind Hideo Kojima himself confirmed that the version of the Solid series' third entry contained in the collection is none other than Subsistence. Aside from MGS3, this enhanced game—with competitive online mode and fully 3D, user-controlled camera—also includes MSX versions of the original Metal Gear (1987) and Metal Gear 2: Solid Snake (1990).
As for the Japanese package: Oddly enough, that version of the Metal Gear Solid HD Collection doesn't include Peace Walker, but DOES have a product voucher for the PSone Metal Gear Solid.