This page contains Metal Gear Solid 4: Guns Of The Patriots Unlockables for Playstation 3 called "Big Boss Extreme difficulty" and has been posted or updated on Jun 13, 2008 by hi. Let us know what you think of this Unlockable by thumbs voting.
- Developer: Kojima Productions
- Publisher: Konami
- Genre: Action Adventure
- Release Date: Jun 12, 2008
- ESRB: Mature
Big Boss Extreme difficulty
Complete the single-player mode once (and saving the cleared data).
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