303 Squadron is not alone in the skies over Britain. A neighboring squadron of Spitfires is heavily engaged with 109s and calls for help. What do you do? This expansion includes 8 planes, plus cards, scenario, and rules for expanded play. It also includes rules so that some of the 303 pilots can "upgrade" to Spitfires. Historically this happened after the Battle of Britain, but we can explore plausible "what-ifs", can't we? More enemies are also included. In this expansion, you find extra Bf.109s and the dangerous Aces of the Luftwaffe. Try to face them during the campaign! This gameplay expansion includes 8 planes, plus cards, scenario, and rules for expanded play. -description from kickstarter campaign