Deadworld: Mississippi Queen

The teens barely manage to survive an attack while driving through a small city but lose most of their supplies. The school bus is deemed unacceptable for our group and when they come across a riverboat on the Mississippi River, they figure it would be safer to be on the water, away from the zombies. Once on the boat, they figure they're safe. But they do not realize that King Zombie is leading a massive army of zombies toward the boat and something like water is not going to stop him.