The HD Collection was previously released for the PlayStation 3 and Xbox 360. However, unlike its console counterparts, the Vita version of the HD Collection omits Metal Gear Solid: Peace Walker, which was a PSP game.
Even though Kojima Productions originally developed and made these games, they were assisted by a few video game developer companies to help them remaster the games and port the MSX games as well. Bluepoint Games were in charge of remastering MGS2 and MGS3 in HD, Aspect Co. was in Charge of porting over the original MSX versions of Metal Gear, and Metal Gear 2: Solid Snake, Genki was in charge of remastering Peace Walker, and Armature Studio was in charge of developing the Vita version of the HD Colecction.
The core game and story for all games remains unchanged with the remastered versions. For the remastering, all three games have had a graphics overhaul to allow them to support modern 720p resolution on consoles, and sub-HD resolution on PlayStation Vita. As well as 720p HD visuals, the console editions of these new versions run at 60 frames per second. All three games have trophy support for the PlayStation 3 and PlayStation Vita versions and achievement support for the Xbox 360 version.