The Metal Gear Solid HD Collection seems like a great way for new and old fans to experience the critically acclaimed series -- if they can just figure out what it includes. Series creator Hideo Kojima detailed some regional differences today, creating a veritable Rubik's Cube of version complexity. Let's go through this together. Slowly.
In Japan (or the "domestic version" for Kojima), the collection includes MGS2 and MGS3, plus a download code for the original. Meanwhile, the North American release (aka, the "overseas edition") includes MGS2 and MGS3, along with the HD update of Peace Walker.
In both regions, the MGS3 version included is based on "Subsistence," which means it will include more camera options and emulated versions of the original
NES MSX Metal Gear games. Kojima also claimed that MGS2 is based on Subsistence, but he probably mean "Substance." That version included extra modes and missions.
If you understand all that and want to get your hands on some sweet, classic MGS action, the collection is set to release on PlayStation 3 and Xbox 360 later this year.