[b]UPDATE:[/b] The game is now available for purchase again on the Steam Store. Users experiencing an issue with their GFWL key will need to verify the game's cache using the Steam client. Once the cache is verfied and the game is re-launched, users will automatically receive new, working GFWL keys through the Steam client. To verify the game’s cache, follow these steps: 1. Restart your computer and launch Steam 2. From the “Library” section, right-click on the game and select “Properties” from the menu. 3. Select the “Local files” tab and click the “Verify integrity of game files...” button. 4. Steam will verify the game's files - this process may take several minutes. 5. Important: One or more files may fail to verify. This is normal for most Steam games. The files that fail to verify are local configuration files that should not be replaced as part of this process. You can safely ignore this message. [strike]Hello [i]Lost Planet[/i] fans, We have received some reports from users experiencing the following error when inputting the Games for Windows Live (GFWL) key provided by the game: “Can’t sign in because your product key is not valid. Please enter a valid product key.” While users will not be able to access the Multiplayer mode without a valid product key, they should still be able to play the Single Player mode. We are looking further into this issue, and as such the game has been temporarily removed for purchase from the Steam Store. More information will be provided on this page as it becomes available. We apologize for any inconvenience this may cause.[/strike] Best Regards, CAPCOM USA Customer Support