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I am wondering if there's any internal (or external) method to keep a backup of every quicksave that you make in-game. I think half life keeps like 2 quicksaves just in case you screw one. Maybe there's a way to never overwrite any quicksave so that you have a real traceable record of how you played the game, and you can go back to any stage of your progress.
If thats not possible, then is there a program that lets auto backup a specific file/folder at a press of a hotkey?