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Left 4 Dead
- A new campaign, "Crash Course", is now available for play in Campaign, Versus and Survival modes
- In Versus mode, all weapons, pills, health packs, molotovs, pipe bombs and other items will now be identical for the second round of a chapter
- Matchmaking has had several improvements to make finding and joining games even faster
- Ten all new "Crash Course" achievements have been added