Like what was said in the introduction page. There is 2 sides, Attacking and Defending. There is a total of 12 rounds in each half.
In this game, we have what you call a "Buy Phase." It's the beginning of every round which allows players to buy guns to use.
IF both sides reach 12 rounds after all 24 rounds are played. They go into overtime where they have to win to rounds in a row in order to win