That would actually make a great management game. You have to keep the boat fueled, supplied, and in good repair (and supply the passengers with distractions like books and movies to keep them mentally healthy) as you make your way towards a safe haven. However, the military guys keep getting orders that mean you have to take detours to acquire samples from population Y or rescue person X. In the regular missions (which plays like regular Dead Island) you can rescue other people, but be careful; they might be mentally unstable, or decide they want to take over the boat for themselves.
If you'll excuse me, I need to go win the lottery and have a word with Techland. Graham and Paul can have producer credits.