Metal Gear Solid 5 has a lovely selection of eighties hits to blast at full volume while you're minigunning the balls off an enemy base, but inevitably you'll want to add your own tracks - anachronistic to the game's 80s setting, but I find Pearl Jam's Do the Evolution fits the bill nicely.
So how to add custom tracks? It's pretty simple actually, as PC Gamer's Andy Kelly points out on Twitter. Just head into the game directory and find the 'CustomSoundtrack' folder.
Dump your chosen songs in there, and you'll be able to choose them as your evac chopper's entrance music. Just one of the perks of being a PC gamer.