Someone just asked me off-list: what's the difference between Rise of Flight (US$17 at Amazon) and Rise of Flight: Iron Cross Edition ($50)? I know that ICE has four more planes, but you can purchase these individually, right? Is there any other difference, once you've patched ROF up to the current level? E.g., can ROF owners play all of the ICE campaigns, log on to all multiplayer servers? Are the graphics in ICE better than a patched-up ROF?