There is. Sb3 is backwards compatible with legacy
Sweet.
Playtesting the map is interesting. I like the hollowed out asteroid, though it could be bigger. Having the entrance at a 45 degree angle is going to make building a base in it interesting. The big metal building base on the huge asteroid is also helpful, though I was hoping for an interior like lost_worlds 3. The distance between these planets is positively vast.
The platform on the spawn planet is helpful, but the spot where the spawn room dumps you shouldn't be on top of it. Maybe beneath it. If anyone is actually building on that platform, they might get mushed.