Not bad map details and optimizations but poor and unfriendly map design

Overall map details and optimizations are really good, but map design is not very friendly because of several puzzles such as finding keys(Which normally doesn't include on usual L4D2 campaigns) and complex map designs... Also third chapter's length is very long and it's boring. If you make map design very simpler just like l4d2 campaigns it should be awesome campaigns of L4D2!

Easy to proceed, but lack of quality and optimizations.

Overall map design, it is fine and easier to proceed. Second chapter is too unoptimized and it gave me serious lag even on saferoom. And I feel this campaign is empty such as large areas and not very detailed. If you spent more time into making more map details and optimizing overall maps, it could be one of awesome campaign.