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Lionheart: Kings' Crusade CD Keys in this format: 1AB2C-D3FGH-456I7-JK8LM-NOP9Q.The Last Remnant CD Keys in this format: 1AB2C-D3FGH-456I7-JK8LM-NOP9Q.Lara Croft Guardian of Light CD Keys in this format: 1AB2C-D3FGH-456I7-JK8LM-NOP9Q.King Arthur - The Role-playing Wargame CD Keys in this format: 1AB2C-D3FGH-456I7-JK8LM-NOP9Q.Killing Floor CD Keys in this format: 1AB2C-D3FGH-456I7-JK8LM-NOP9Q.Kane & Lynch 2: Dog Days CD Keys in this format: 1AB2C-D3FGH-456I7-JK8LM-NOP9Q.Note: Please input all O's and 0's as Q's for Just Cause 2.Just Cause 2 CD Keys in this format: 1AB2C-D3FGH-456I7-JK8LM-NOP9Q.IL-2 Sturmovik: Cliffs of Dover in this format: 1AB2C-D3FGH-456I7-JK8LM-NOP9Q.Humble Indie Bundle 3 in this format: 1AB2C-D3FGH-456I7.Humble Indie Bundle 2 in this format: 1AB2C-D3FGH-456I7-JK8LM-NOP9Q.Humble Indie Bundle in this format: 1AB2C-D3FGH-456I7-JK8LM-NOP9Q.Homefront CD Keys in this format: 1AB2C-D3FGH-456I7.GTR Evolution CD Keys in this format: 1AB2C-D3FGH-456I7-JK8LM-NOP9Q.GTI Racing CD Keys in this format: 1AB2C-D3FGH-456I7-JK8LM-NOP9Q.Note: Keys purchased directly from the Global Agenda website cannot be registered on Steam.Global Agenda CD Keys in this format: 1AB2C-D3FGH-456I7-JK8LM-NOP9Q.Front Mission Evolved CD Keys in this format: 1AB2C-D3FGH-456I7-JK8LM-NOP9Q.Football Manager 2012 CD Keys in this format: 1AB2C-D3FGH-456I7.Football Manager 2011 CD Keys in this format: 1AB2C-D3FGH-456I7-JK8LM-NOP9Q.Football Manager 2010 CD Keys in this format: 1AB2CD3FGH456I7JK8LMNOP9Q.Football Manager 2009 CD Keys in this format: 1AB2CD3FGH456I7JK8LMNOP9Q.Fallout: New Vegas CD Keys in this format: 1AB2C-D3FGH-456I7-JK8LM-NOP9Q.3 CD Keys in this format: 1AB2C-D3FGH-456I7 2: Project Origin CD Keys in this format: 1AB2C-D3FGH-456I7-JK8LM-NOP9Q Empire: Total War CD Keys in this format: 1AB2C-DEFGH-IJK4L-MNOPQ-RST56.Elder Scrolls: Skyrim in this format: 1ABCD-D3FGH-45I67.
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Dungeon Siege III in this format: 1ABCD-D3FGH-45I67.Dungeons and Dragons: Daggerdale in this format: 1AB2C-D3FGH-456I7.Duke Nukem Forever CD Keys in this format: 1AB2C-D3FGH-456I7-JK8LM-NOP9Q.Deus Ex: Human Revolution Keys in this format: 1AB2C-D3FGH-456I7.Defense Grid CD Keys in this format (Direct2Drive only): 1AB2C-D3FGH-456I7-JK8LM-NOP9Q.Dead Island - CD Keys in this format: ABCD1-2345E-FGHI6.Dawn of War II - Retribution CD Keys in this format: 1AB2C-D3FGH-456I7.Dawn of War II CD Keys in this format: 1AB2C-D3FGH-456I7-JK8LM-NOP9Q.Note: The number 2 and letter Z may look very similar.Darksiders CD Keys in this format: 1AB2C-D3FGH-456I7-JK8LM-NOP9Q.Dark Messiah CD Keys may also have been printed incorrectly, please see the Dark Messiah article.Dark Messiah Multiplayer CD Keys in this format: 1AB2C-D3FGH-456I7-JK8LM-NOP9Q.Dark Messiah CD Keys in this format: 1AB2C-D3FGH-456I7-JK8LM-NOP9Q.The Cursed Crusade CD Keys in this format: 1AB2C-D3FGH-456I7.Cricket Revolution CD Keys in this format: 1AB2C-D3FGH-456I7-JK8LM-NOP9Q.Commander: Conquest of the Americas CD Keys in this format: 1AB2C-D3FGH-456I7-JK8LM-NOP9Q.Civilization V CD Keys in this format: 1AB2C-D3FGH-456I7-JK8LM-NOP9Q.Cities in Motion CD Keys in this format: 1AB2C-D3FGH-456I7-JK8LM-NOP9Q.Call of Duty 4: Modern Warfare is not accepted on Steam.Call of Duty: Black Ops CD Keys in this format: 1AB2C-D3FGH-456I7-JK8LM-NOP9Q.Call of Duty: Modern Warfare 3 CD Keys in this format: 1AB2C-D3FGH-456I7.Call of Duty: Modern Warfare 2 CD Keys in this format: 1AB2C-D3FGH-456I7-JK8LM-NOP9Q.BRINK CD Keys in this format: 1AB2C-D3FGH-456I7.Borderlands CD Keys in this format: 1AB2C-D3FGH-456I7.Audiosurf CD Keys in this format: 1AB2C-D3FGH-456I7-JK8LM-NOP9Q.Anomaly: Warzone Earth in this format: 12345 - ABCDE - 6789F.Alter Ego CD Keys in this format: 1AB2C-D3FGH-456I7.Alpha Prime CD Keys in this format: 1AB2C-D3FGH-456I7-JK8LM-NOP9Q.Predator (2010 Release) CD Keys in this format: 1AB2C-D3FGH-456I7-JK8LM-NOP9Q Valve CD Keys in this format: 1AB2C-D3FGH-456I7.Valve CD Keys in this format: 1AB2C-D3FGH-456I7-JK8LM-NOP9Q.Here is the list from Steam of supported Steam games (up to date as of today, 02-05-2012): Start the game through Steam, and in the game you can press SHIFT+TAB to get the Steam Overlay.Browse for games on your computer or put a check next to the game(s) you wish to add to the Library.Click the Games menu, choose Add a Non-Steam Game to My Library.If your game is not supported to be registered, you can still use the Steam overlay. Here is a link to the Steam support which tells you more details and gives you a comprehensive list of all games that can be activated using Steam: