Alan Wake v1.05 release notes:

? Fixed crashes with Alt-Tab in SLI configurations.
? Fixed saving of assigned keys so that both Numlock on/off states work and can be defined separately.
? Fixed command line handling so that invalid input does not cause the game to enter unresponsive (“No World Loaded”) state.
? Added better error messages to File IO operations to track down some problems.
? Please see our forum for up to date troubleshooting and update information: http://forum.alanwake.com/showthread.php?t=7759



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