A new (free) content update has been released for Crimson Dragon. From PlayXBLA:
Riders of Icarus Division, prepare yourselves for an all-new challenge. No, these aren’t in-game challenges, but rather a new way for you to enjoy Crimson Dragon. Today, January 27th, in the wee hours of the morning, there was a Content Update to Crimson Dragon (4GB) which pushed out the anticipated Multiplayer mode. Now you’re able to soar the skies with a friend over Xbox Live!
This Content Update is free to you, and the next time you turn on Crimson Dragon, you’ll be prompted to start the update. In addition to bringing in Multiplayer, the designers behind the game have introduced a new difficulty level, Insane, to test your skills. Hop in and experience Crimson Dragon like you never have before, with your Xbox Live friends.