A few friends and myself enjoy this game.
Everyone starts out on their own, there are secondary flags that must be captured first. After a good firefight with someone, you join up in a 2 man team and head into the area (woods on my property) that the main flag is located. By that time the other two or four guys have met up and battled one another and are now a team that you will fight against.
Its a lot of fun because you can add certain elements, you can play for a good period of time against everyone and whoever captured the most flags on their own aside from the main flag that must be captured in 2 man teams can win something or gets a closer headstart on the next match.