Metal Gear Solid 5 has a new update - its first in nearly a year - that lets you play as Quiet.
Quiet is the scantily-clad assassin from the main Phantom Pain game. She's scantily-clad because she breathes through her skin. Yes, really.
Now, you can play as Quiet to infiltrate FOBs. You can't change her uniform or head options (because she'd suffocate, right?), but she is great with a sniper rifle. She's proper fast and can jump over high steps you'd normally need a ladder for. She also has a special dash, and staying still for a bit makes her stealthy.