"VR missions" was marketed and sold very differently in different regions so many people don't remember it as a standalone game.
In PAL regions, it was sold and functioned more like an expansion. "Special Missions" usually came in a bundle because you needed the original disc to determine the language.
I thought I'd played "Special Missions" but a limited number of VR missions came on the UK version of the original.
Looks fun
PS1 MGS games?
As in plural as in there was more than 1 MGS game for PS1?