SOURCE 1 SDK LICENSE

Source SDK Copyright(c) Valve Corp.

THIS DOCUMENT DESCRIBES A CONTRACT BETWEEN YOU AND VALVE CORPORATION ("Valve"). PLEASE READ IT BEFORE DOWNLOADING OR USING THE SOURCE ENGINE SDK ("SDK"). BY DOWNLOADING AND/OR USING THE SOURCE ENGINE SDK YOU ACCEPT THIS LICENSE. IF YOU DO NOT AGREE TO THE TERMS OF THIS LICENSE PLEASE DON’T DOWNLOAD OR USE THE SDK.

You may, free of charge, download and use the SDK to develop a modified Valve game running on the Source engine. You may distribute your modified Valve game in source and object code form, but only for free. Terms of use for Valve games are found in the Steam Subscriber Agreement located here: http://store.steampowered.com/subscriber_agreement/

You may copy, modify, and distribute the SDK and any modifications you make to the SDK in source and object code form, but only for free. Any distribution of this SDK must include this LICENSE file and thirdpartylegalnotices.txt.

Any distribution of the SDK or a substantial portion of the SDK must include the above copyright notice and the following:

DISCLAIMER OF WARRANTIES.  THE SOURCE SDK AND ANY 
OTHER MATERIAL DOWNLOADED BY LICENSEE IS PROVIDED 
"AS IS".  VALVE AND ITS SUPPLIERS DISCLAIM ALL 
WARRANTIES WITH RESPECT TO THE SDK, EITHER EXPRESS 
OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, IMPLIED 
WARRANTIES OF MERCHANTABILITY, NON-INFRINGEMENT, 
TITLE AND FITNESS FOR A PARTICULAR PURPOSE.  

LIMITATION OF LIABILITY.  IN NO EVENT SHALL VALVE OR 
ITS SUPPLIERS BE LIABLE FOR ANY SPECIAL, INCIDENTAL, 
INDIRECT, OR CONSEQUENTIAL DAMAGES WHATSOEVER 
(INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS OF 
BUSINESS PROFITS, BUSINESS INTERRUPTION, LOSS OF 
BUSINESS INFORMATION, OR ANY OTHER PECUNIARY LOSS) 
ARISING OUT OF THE USE OF OR INABILITY TO USE THE 
ENGINE AND/OR THE SDK, EVEN IF VALVE HAS BEEN 
ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.  

If you would like to use the SDK for a commercial purpose, please contact Valve at sourceengine@valvesoftware.com.