|Left 4 Dead - What Are You Trying To Prove?||0|
|Survive all campaigns on Expert.|
Get a good team of survivors up with 3 other players and try to go through each campaign. Don’t worry if you die, just as long as one person gets into the last safe room of each chapter, you're good to go. Staying together is the best advice I can give.
This does not have to be done in one sitting. Although, each individual campaign must be done in one sitting.
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