Spec Ops: The Line
50 Achievements
1,000
15-20h
Xbox 360
Xbox One
Xbox Series
Treacherous Ground
Look out below.
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How to unlock the Treacherous Ground achievement in Spec Ops: The Line - Definitive Guide
This is story related. It comes at the end of Chapter 2 when you have been ambushed, just successfully defend your position until a sandstorm comes and opens a hole in the ground which you will fall in.
Story related, cannot be missed. You get this trophy for finishing chapter 2.