Instruct: Classify Amazon reviews into positive or negative sentiment
Query: perfect!

best game out there! valve has outdone there self again!pros:great graphicsgreat musicgreat weapen controlscons:theres lots of glitches if you dont do something right then you have to reload your game so you may want to save ALOTit takes a LLLLOOOOOONNNNGGG time to load and the "scanning steam game updates" stops you from playing the game for about an hour then another hour to load the updateyou run out of ammo fastif your a hard core gammer and like fps games this is the best!