Play as Steven, Garnet, Pearl, Amethyst, Lapis Lazuli, Bismuth, Peridot, and Greg Universe (added in the 4.0 patch complete with his own musical combat abilities).
Because the game is no longer for sale, the community surrounding Unleash the Light has largely shifted toward preservation. However, acquiring or executing custom NSP files comes with strict technical and safety boundaries:
Stay safe, backup your game saves, and keep on fusing, gems.