It will be real-life SCENESTER RISING: 14 HOUR SURVIVAL MODE.
Make sure to hook a hose up to your pee-pee and run it out the nearest window so you can tinkle.
FWIW, I booted up Crackdown again the other day, and was stunned at how well it holds up. Not only that, the game has start-to-finish drop-in co-op, co-op mission replay, instanced game objects which appear per-user, so each player is not only running around in a shared world, but also in a world which reflects only their level of progress.