One of the distinct advantages of playing post-apocalyptic role-playing game Fallout 4 on the PC is the sheer amount of community generated content (or mods as they're called).
While we've seen mods that improve the visual quality of the game and augment the number of items you can carry, this latest one from Fallout 4 modder Akbiba91 lets you play the game as characters from Metal Gear Solid V: The Phantom Pain.
(Also see: Fallout 4 Review)
"Metal Gear Solid mods are finally back! A lot of you asked me to reupload all the files I did, from the eyepatches, to the hair, to the Sneaking Suit. A[nd] finally had the approval by KONAMI itself to use their assets (sic) to make mods, as you can see from the attached picture, so I'm back with everything ALL IN ONE!" a post by Akiba91 on the mod's page reads.
What this means is you can play as Quiet, Snake, and Skull Face. Metal Gear Solid V: The Phantom Pain's protagonist Snake can be modified with different eyepatches, suits, arms, horns, and more. You can get it here.
To make the most of it, you will need another mod called Armorsmith Extended. This will let you make Metal Gear Solid items via Fallout 4's workbench - the game's item creation feature.
Keep in mind though that using too many mods may hamper performance or worse, result in game-breaking issues the moment a new official patch hits. And in Fallout 4's case, the updates seem to be coming along at a steady clip. Perhaps, in the lead up to the first sliver of downloadable content.