We also made further improvements to the interface and fixed a bunch of bugs and stability issues. What’s new in Alpha 16? We’ve re-enabled and improved saving and loading and completely rewrote the rendering backend to implement logarithmic z-buffering, which addresses graphical issues and paves the way for some big visual changes. If you already own Universe Sandbox ², just run Steam to download the latest version. Today also marks the release of another big update, Alpha 16. After nearly 4 years of development, Universe Sandbox ² is now on Early Access and available for purchase directly through the Steam Store.