Those who already finished and completed all achievements for BioShock by Irrational Games and Take-Two Interactive (for the PC and Xbox 360) now have a new reason to play with Big Daddy again. A new BioShock achievement has been spotted, but the exact details of this is still a mystery.

There are already some clues lying about what this could possibly be. Rumors of a new achievement surfaced just a few days ago, which reportedly first appeared in the German version of BioShock. Here's the English translation, provided by a helpful reader from Xbox 360 Fanboy forums: "Bullet proof. Complete the game on Hard difficulty without using a Vita-Chamber."

It's not yet confirmed if this is the same thing as the one we're seeing in the US version right now, but what we do know is that this certain achievement is now the 51st in BioShock's list, and packs in about 100 Gamerscore points when unlocked and achieved.

Do stay tuned for more updates!

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