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Niosa Refinery is the first map in Orion's Threat, one of the campaigns introduced in Alien Swarm: Reactive Drop.

Objectives Edit

  • Destroy Swarm Eggs 0/23
Clear complex area.
  • Redirect power
Restore power inside LVC.
  • Recieve Code
Unlock access to the deeper levels.
  • Proceed deeper inside the facility
Go deeper inside.

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