Which Games Belong on Metal Gear Solid: Master Collection Vol. 2?

With Metal Gear Solid: Master Collection Vol. 2 on its way, I explore which games deserve a spot in the next release.

[OtterX]

Yes! I loved the Metal Gear Acid games on PSP! The Metal Gear vibe translated very well to a tactical card battle game. I'd go back and experience them again.

[Hugodastrevas]

People will finally be able to play MGS4, congratulations!

[DEAGLETURK]

MGS4 or no buy

[Futureshark]

Got to be
Peace walker
Portable ops
Guns of the patriots

Revengence as a bonus!!

[Chocoburger]

Ghost Bable (GBC)
Metal Gear Solid Mobile (Nokia phones - currently abandonware lost to time)
Ac!d 1 & 2
Portable Ops
Guns of the Patriots (needs MGO 2 to return)
Peacewalker
Revengeance
Ground Zeros / Phantom Pain

A mighty fine list of games for Volume 2. Basically add all the remaining games, cannon and non-cannon. Except for Twin Snake since Nintendo may have some ownership of it, they'd have to go back inside the code and remove Nintendo characters from it, if ported to anything outside of a Nintendo platform, no easy or simple way to do that since the original dev team is long gone by now.

[Chocoburger]

I forgot about Metal Gear Solid Touch (iOS and also abandonware) it requires an old and hacked iOS device to play these days, and I actually bought an iPAD 3 last year to play it and other old iOS games.