Buy an Airsoft weapon. These range from rifles to handguns and pistols and can be found on various websites.
Arrange a meeting with other Airsoft players. Decide on the rules during the meetings.
Decide what type of Airsoft game you're playing. There are various methods of play, including re-enactments of actual battles and military simulations.
Find a proper place in which to hold the Airsoft battle. A large, uninhabited piece of land or farmland are ideal places. Some people may have a specific landscape in mind to simulate a certain battle or part of the world.
Suit up and go to battle.