It has to be done in 1 sitting. If you ever played "Starfox 64"? same thing. short game where you do missions and choose your path and can make a runthrough of the game in 10-20 minutes depending on how fast you like to go.
If you're playing it for the achievements, you have nothing to worry about. the achievements are pure cake. its only 1 avatar award that is hard to get.
Last edited by Jon Mcloud; 08-15-2010 at 09:32 PM.