Metal Gear Solid: Peace Walker
50 Achievements
86-105h
PS3
Big Boss
Cleared all MAIN OPS and EXTRA OPS missions at Rank S.
2.8%
How to unlock the Big Boss achievement in Metal Gear Solid: Peace Walker - Definitive Guide
This guide was translated automatically.
To get this achievement, you must complete ALL (!) missions in the game (including Monster Hunter missions) to rank S. You must act covertly, not kill anyone, not raise the alarm, and complete missions as quickly as possible. It's much faster to get the achievement in co-op.
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