If you consider vague descriptions of a character that was shown in trailers two years ago to be a spoiler for Metal Gear Solid V: The Phantom Pain, you should probably stay out of here.
For everyone else who wants updates on a game-breaking bug, come right in!
So, how about that bug, eh? Konami knows about it, and as of today, it has offered up some advice.
you use Quiet on missions 29 or 42, you can trigger this glitch that
basically screws up your save file. So! Either don’t use Quiet on those
missions, or, as Konami has revealed, use the Butterfly Emblem, or avoid
raising your Bond to Quiet to the maximum level during these missions.
doesn’t have an ETA yet on the patch that will recover your save data,
but it’s apparently in the works. So there you have it — it’s pretty
specific and unfortunate, but now you know.
Metal Gear Solid V [Konami via Game Informer]