Alien Swarm Update Released
 

Updates to Alien Swarm have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:

Alien Swarm

• Fixed crash to desktop on certain graphics cards
  
• Fixed matchmaking sending you to the wrong mission
  
• Fixed not being able to earn the “Ammo Technician” achievement
  Fixed not being able to open particle systems in the editor
  

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