The game offers players set missions to complete, such as take out this strategic base on an island or blow up this flying aircraft carrier, but in a procedurally generated world. Thus while the objective may be the same, the location changes. You get to choose what type of aircraft you want to fly and even pick out its arsenal to ensure you've got the right weapon for the job. The only catch is that there is perma-death. Thus all your progress could be wiped out in an instant if you're not careful. Ideally, that's where having a friend along to watch your six comes in handy.