1. Black Mesa Achievements
  2. Gray Matter Propulsion achievement
Black Mesa

Black Mesa

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4.42
Game action
Black Mesa
Shughy

Shughy

139
9
18 May 17
16h 24m
18%
Shughy

Gray Matter Propulsion achievement in Black Mesa

Gray Matter Propulsion

Headshot 20 enemies with the .357 magnum.

Gray Matter Propulsion0
20 May 2017
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