Complex sentence: The PC version was on sale as a download until late 2010, when Atari silently removed the game from their on-line store, but copies can be found on Amazon, Good Old Games online distributor, and other stores.
Split into simpler sentences: The PC version was on sale as a download until late 2010, when Atari silently removed the game from their on-line store. While the game is no longer on sale directly from Atari copies can be found on Amazon, Good Old Games online distributor and other stores.