click here for critical ops official website
in this website can you get the standart information about the game, like how it works and what kind of events are going on.you should check out this website if you have some questions about the game. what this website makes different of all the other sites that this website is based on what the beginners need to know. like wich guns are the best. also i give you an explanation about some terms you might not know. like eco round, stack, and rush. the last thing is the callouts, if you wanna go pro you need to learn al the callouts. in this website you can all the informaton you need to know.
good luck.