Microsoft Game Studios today announced the first expansion pack for the critically acclaimed Flight Simulator X, released last Fall, has gone gold and will begin hitting retailers throughout North America on Oct. 23rd. Developed by ACES Studio, Flight Simulator X: Acceleration adds a wealth of new content and features, allowing gamers to race against each other in amazing, highly-detailed locations around the world. Aviators are able to test their skills and heroism in more than 20 new missions while enjoying three exciting new aircrafts including the F/A-18A Hornet, P-51D Mustang and EH-101 helicopter. Players will also have the ability to share rewards, photos and videos with friends and the broader flight simulator community. Flight Simulator X: Acceleration will be available for the estimated retail price of $29.99 for Windows. The original game is required in order to play the expansion.