Copyright © 2007 by Xtreme Prototypes, Inc. All rights reserved.

The X-15 for Flight Simulator series of add-on rocket aircraft is neither freeware nor shareware and is subject to the terms of use specified in the end-user software license agreement included with each product. The user must accept the license agreement before installing or using the products.

All images are actual screenshots of the Xtreme Prototypes X-15-1, X-15-2/3 and X-15A-2 add-on rocket aircraft for Flight Simulator, captured in the Microsoft® Flight Simulator 2004 and Flight Simulator X game environments, except where otherwise noted. NASA photos have been used for illustration and educational purposes and are the property of their respective owners, as credited. Portions of the manuals have been inspired or adapted from the original real-world X-15 utility flight manuals published during the 1950s and 1960s by the U.S. Air Force and North American Aviation.

Microsoft, Microsoft Flight Simulator, Windows and DirectX are either registered trademarks or trademarks of Microsoft Corporation. Adobe and Adobe Acrobat Reader are either registered trademarks or trademarks of Adobe Systems Incorporated. Other company or product names mentioned herein may be trademarks or registered trademarks of their respective owners.

The ESRB ratings icon is a registered trademark of the Entertainment Sofware Association. Software platform logo (TM and ©) IEMA 2007.

Xtreme Prototypes is not affiliated with NASA, North American Aviation (Boeing), the U.S. Air Force, or any other company, entity or government organization related to the X-15 research program. The products mentioned above are neither sponsored nor endorsed by NASA.

Software features, user manual and website contents are subject to change without notice.