Metal Gear Solid 5: The Phantom Pain – how to make GMP quickly

Make a lot of money in Metal Gear Solid 5: The Phantom Pain with these handy tips. Metal Gear Solid 5: The Phantom Pain – how to make GMP quickly Making GMP in Metal Gear Solid 5: The Phantom Pain isn't super hard, as long as you're willing to put in a bit of groundwork.