The older the game, the more plausible, and there have even been cases where companies have mistakingly issued duplicate keys. If your unlucky to then recieve this key in a box, it will come up as having previously been used. Brad Metclaf reports experience with users having simply 'brute forced' a key, where a random generator allows users to simply 'keep trying' until their phoney key works. Used Keys: Use keys are a bigger issue then it implies. It is entirely possible that a key may simply 'expire', at which point, a system like Steam will often reject them. I can tell you, however, that not all keys come from Steam. In theory, all reports suggest that an official Steam key should not expire. Outdated Keys: This one appears to be of debate. Contacting Steam, directly, may be the only other was to resolve this particular case. If the game is still brand new, it would be a good idea to return the game. The reason or fault behind each case is irrelevant, but ultimately, it sometimes happens.

This appears to be the main issue you are having, given that neither of the two games are listed as supported.ĭodgy Keys: There have been cases where 'dodgy keys' have been included with games.

There is a pretty good list provided here, which also includes a rough format guide, to identify if a particular key follow the format expected from Steam. Unsupported Keys: Not all CD keys are intended for use with Steam. I have a good idea why your specific keys are not working, which I have detailed, down the bottom. There are a couple of reasons a CD key would not work with Steam.

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