Complex sentence: The game was created under contract by Shawn Lohstroh for two brothers Paul and David Bettner who owned Newtoy Inc. at the time who had no idea how famous the game would become.
Split into simpler sentences: The game was created under contract by Shawn Lohstroh for two brothers Paul and David Bettner who owned Newtoy Inc. at the time. They had no idea how famous the game would become.