The only thing that
Combat Squadron brings to the plate is more planes (WW II planes to be specific) and new missions. If you play it with
Microsoft's Combat Simulator, Combat Simulator 2, or
Flight Simulator 2000, it will play exactly like the respective game. The only things added to the game are aircraft and missions. Otherwise, the game is exactly the same.
Almost 20 WW II aircraft are included to look and feel like the real thing. The control panels are accurate, the plane models are okay, and the flight characteristics are unique. If you're in to the WWII planes, you should appreciate this add-on.