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All rights reserved. Valve, the Valve logo, Half-Life, the Half-Life logo, the Lambda logo, Steam, the Steam logo, Team Fortress, the Team Fortress logo, Opposing Force, Day of Defeat, the Day of Defeat logo, Counter-Strike, the Counter-Strike logo, Source, the Source logo, Counter-Strike: Condition Zero, Portal, the Portal logo, Dota, the Dota 2 logo, and Defense of the Ancients are trademarks and/or registered trademarks of Valve Corporation. All other trademarks are property of their respective owners.
Note: this license should only be used on content if the copyright is owned by Valve, and it does not fall into any of the following categories:
- Artwork images: use
- Screenshots: use
- Audio clips: use
- or other media extracted from game files; use
Please see Portal Wiki:Licensing images for more information.