$IENT WarBirds is the Single Player version of the world famous Massively Multiplayer Online Simulation game of World War II flying and aerial combat. The original WarBirds was launched in 1995. WarBirds has been continuously updated with new aircraft, new terrains, new features, improved flight models, better graphics every 6 months since launch. The latest WarBirds 2013 added over 40 new features to the WarBirds legacy!