Aloft is an upcoming sandbox survival game where players explore islands floating in the sky, and they can bring along a bunch of friends to do so as well. What's interesting is how the mobile nature of these islands - you can fly them - ensures that progress is not locked when someone else isn't playing or that they aren't left behind either. Everyone has their own home island, and they can bring that with them wherever they go. While Aloft has sky-high ambitions on the co-op front, it's not coming up short on the core content for solo players either.