A different take on the tower defense style game. Working as a transport ship pilot, you make your, erm... space runs to get yourself back up economically, by delivering goods while defending yourself from asteroids, raiders and competitors. Each client you make contact with during the story mode has something different for you to deliver, be it passengers, waste products etc, so it'll require you to redefine your building strategies in every mission. I haven't really felt motivated to improve my strategies as I got half-way through the story mode, so I left it just half done and moved over to its sequel.