The biggest feature of the Stanly Parable that made it good, was the narrator and his humor.
I hope you aren't thinking about doing it without audio or ripping the audio of the original game.
Blatantly copying games is just the worst and removing a key element out will just ruin the game.
So unless you are recording entire new story with dry British humor and a good voice actor with a pleasant voice and turning all the audio in .ogg's (of less than 1MB). I don't see a good future for your game.
Plus, don't forget that players need to download all the audio when they join your server too.
