What is a one-sentence summary of the following article?
In this game mode, two teams compete to reach the other side of the map and return the other team's flag to their own base. If you are shot, you are out, as in normal play. If one team loses all of their players, the other team is free to walk the flag back. Often, this game will be played with a time limit decided by both teams. Even if you eliminate everyone, you still have to navigate to the other side and find the flag and get it back to your side. This game requires teamwork and tactical speed. This is as nitty and gritty as it gets. In this game mode, two teams fight to eliminate all other players on the opposing team. The game ends when all of one team's players are out, or the time limit is reached. In this game mode, one team has one life each, and must Try to defend a fort from oncoming attackers within a fairly short time limit. The attackers, however, have unlimited respawns, so can wipe off the paint, return to their base, and then start their assault again. The game is over if the attackers infiltrate the base or the time limit is reached. This game mode is similar to Deathmatch, but there are no teams. Everyone fights everyone, and the game is over when only one person survives. It's usually common to form alliances in the middle of the game, which will obviously be broken somewhere down the line. This can be a lot of fun. All paintballing places will have a strict set of rules, which must be followed at all times for the safety of yourself and of others. For example, many places enforce a 3m rule. If you are closer than 3 meters to another player, you must not shoot them due to the dangers it poses. Some paintballing places give bonus points based on good tactical skill or plays. There are countless variations and local games, but the basics are usually the same.

Summary:
Play Capture the Flag (CTF). Play Deathmatch. Play Fort Assault. Play Free-for-all (FFA). Play by the local rules.