M4 Tank Brigade is a unique free-to-play online multiplayer game based on WWII ground and air combat vehicles. Players control squads of up to 4 different vehicles, can swap to and from each vehicle and direct the squad with simple mouse controls. Uniquely large terrains with hundreds of miles of detailed ground elements offer nearly endless varieties of combat environments, from desert to mountains to urban and rural locales. Despite the vast size of the terrains, a unique combat/gaming AI-based system insures immediate and continuous action. Online play offers hundreds of opponents from around the world, beautiful terrains and modeled vehicles, and challenging missions. Tournaments and events are frequently available with prizes for top players. Aircraft including bombers and fighters are also available for use by players.