MGS5 possibly has micro-transactions according to the Italian Playstation Pre-Order Store. https://archive.is/TdMGG
>The line "Acquisti in-game opzionali," which roughly translates to "optional in-game purchases," confirms suspicions first raised by a few recent previews of The Phantom Pain.
>At one point in The Phantom Pain demo, according to Otero, attempting to speed up development on Mother Base resulted in the following prompt: "Reduced time features cannot be used in offline mode."
>The Phantom Pain uses the same in-game currency system as Metal Gear Solid: Peace Walker, called Gross Military Product, or GMP. Similar to Peace Walker, GMP is used in The Phantom Pain to build up your base.
>Speculation says that the PSN requirement, combined with the reveal of "optional in-game purchases" on the game's store page, could indicate the use of real money for certain features relating to Mother Base, like buying GMP, but nothing has officially been confirmed by Konami.