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:

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