Combat Flight Simulator WWII Europe Series is the first version of combat flight simulators from Microsoft. set in the European Theater of World War II. you are a combat pilot during World War II, for either the RAF, USAAF or Luftwaffe. There is a full campaign mode, which takes in the Battle of Britain, defending London during the Blitz, and finishing the job started on D-Day by pummeling ground targets. You can also play individual missions or fly freely.