LOL! wow, you guys are pretty naive. The only reason they said that the game CAN last for ten hours(5 Crysis days) was to show you that 2 hours in real life is one day in Crysis, not that you HAVE to play for 10 hours. In multiplayer there will be a day/night cycle so that is why it will be so cool. Most games will probably only last 1 Crysis day(2 hours). Research a little and you will figure it out.