1. Aliens: Dark Descent Achievements
  2. Perfect Organism achievement
Aliens: Dark Descent

Aliens: Dark Descent

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Aliens: Dark Descent

Perfect Organism achievement in Aliens: Dark Descent

Perfect Organism

Finish the game on "No One Can Hear Them Scream" mode.

Perfect Organism-1.0
Offline Mode - These achievements require play in game modes that do not necessitate a connection to any online services.Single Player - These achievements can be obtained by a single player.Difficulty Specific - These achievements require that the game be played on a certain difficulty level.
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