Storyline was great, Concept is good - Too little content for such an overpriced game, Valve know this. I am so angry at how quickly I finished this. I took my time exploring the environment, listening to dialogue and I completed it in 2 hours.......2 hours......... 4 clocked up with coop. What is with the insane amount of loading screens? Get rid of the obvious valve fanboys(and possibly shamleless employee reviews) from this site, be impartial we know the game looks and plays great; BUT IT LASTS MAX 4 HOURS LONG, which is a terrible rip off. Lovely looking game, excelent concept, great storyline but with terrible length and 0 replay for the singleplayer. Do not buy this, its not worth it, Valve I love you, but lower this game to 25-30 bucks immediately and refund everyone their money. Also the critic reviews, are disgusting. Get some constructive criticism in there and more critic reviews than 14 please to counter the garbage that has already been posted.