1. Alien Swarm: Reactive Drop Achievements
  2. Outstanding Execution: Research 7 achievement
Alien Swarm: Reactive Drop

Alien Swarm: Reactive Drop

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Alien Swarm: Reactive Drop
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Outstanding Execution: Research 7 achievement in Alien Swarm: Reactive Drop

Outstanding Execution: Research 7

Complete the Research 7 campaign on Normal difficulty or harder without any marines dying.

Outstanding Execution: Research 70

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