 The fourth set that was released in 2010, "Wings of War - Flight of the Giants" adds heavy bombers into the game.However, it is not a stand-alone game and serves as an extension to any previous WoW game.The two booster packs "Wings of War - Recon Patrol" and "Wings of War - Top Fighters" (both Nexus Editrice 2006) add new plane models to the game, giving additional maneuvre decks, but can only be used by owners of at least one set.