http://store.steampowered.com/subscriber_agreement/
- ONLINE CONDUCT, CHEATING AND ILLEGAL BEHAVIOR
You agree that you will be personally responsible for any use of your Account with your login and/or password and for all of the communication and activity on Steam that results from such use of your Account and of Steam, and that Valve is not responsible of the use made of your Account and of all communications and activities on Steam resulting from the use of your Account. If you believe that the confidentiality of your login and/or password may have been compromised, you must notify Valve via the support form (https://support.steampowered.com/newticket.php) without any delay.
Your online conduct and interaction with other Subscribers should be guided by common sense and basic etiquette. Specific requirements may also be found in the Steam Online Conduct rules at http://steampowered.com/index.php?area=online_conduct, other Rules of Use, the Subscription Terms, or in terms of use imposed by third parties who host particular games or other services.
Steam and the Content and Services may include functionality designed to identify software or hardware processes or functionality that may give a player an unfair competitive advantage when playing multiplayer versions of any Content and Services or modifications of Content and Services (“Cheats”). You agree that you will not create Cheats or assist third parties in any way to create or use Cheats. You agree that you will not directly or indirectly disable, circumvent, or otherwise interfere with the operation of software designed to prevent or report the use of Cheats. You acknowledge and agree that either Valve or any online multiplayer host may refuse to allow you to participate in certain online multiplayer games if you use Cheats in connection with Steam or the Content and Services. Further, you acknowledge and agree that an online multiplayer host may report your use of Cheats to Valve, and Valve may communicate your history of use of Cheats to other online multiplayer hosts. Valve may terminate your Account or a particular Subscription for any conduct or activity that Valve believes is illegal, constitutes a Cheat, or otherwise negatively affects the enjoyment of Steam by other Subscribers. You acknowledge that Valve is not required to provide you notice before terminating your Subscriptions(s) and/or Account, but it may choose to do so.
You may not use Cheats, automation software (bots), mods, hacks, or any other unauthorized third-party software, to modify or automate any Subscription Marketplace process.
Recalco la parte de software de terceras partes no autorizado. Es ilegal.