Red and Blue teams up against a common enemy in the upcoming CO-OP mode.
Well, I guess it's about time for the two teams to work together for a common cause. this is pretty much TF2's "horde" mode, where you and up to five other players will work together to take on an army of violent robots modeled after them.
Update for CO-OP goes live on August 15.
Here's an image of the new map that's going to be used in the co-op mode:
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