It has a custom physics engine as well, that allows us to do things like multi-threading and even leverage the power of a GPU if it supports OpenCL. Universe Sandbox ² is completely redone from the ground up in a new game engine (Unity 3D). It was limited quite a bit by the technology it was built on, and it only worked on certain platforms. Lemme know if I did something wrong.The original Universe Sandbox is mostly a gravity simulator, written primarily by Dan. I tried to copy/paste what the OP said in a way that is easier to understand. Realism: 3D map of the obserable universe with all the planets Like if you were something special actually flying through space Graphics: you can see all diffrent objects enough I guess, but its not in a high resolution. Sandbox: sandbox game where you can settings on the objects, but you cant add play around like a litte kid in a or remove objects. Operability: Takes long to learn controls and many everything is very clear settings and options make it a bit complicated to use Lag free: framerate goes down very close on planets State of Game: crowdfounding (alpha/beta) Realism: Very realistic physics and data Accurate Lag free: If you spawn to many objects framerate goes down Quick Edit to Clarify (I like your comparison btw). When you are more the guy that is Fascinated by the beautiful graphics, and likes to discover like if you were in a NASA space mission, then I would recommend you Space Engine. When you are more the guy that likes to play god, create, destroy stuff, and wants to build around with the objects of the universe then I would strongly recommend you Universe Sandbox² Realism: Very realistic physics and data Accurate and realistic 3D map of the Something special actually flying through space for a sandbox game its Great: you can see all diffrent objectsĮnough I guess, but its not in a high resolution. Play around like a litte kid in a or remove objects. Sandbox as the name says: very good almost none: you can only change theĪspects: sandbox game where you can settings on the objects, but you cant add Operability: controls are easy to learn and Takes long to learn controls and manyĮverything is very clear settings and options make it a bit The framerate goes down very close on planets Lag free: If you spawn to many objects framerate goes down when you very fast Stableness of Almost never crashes Freezes sometimes

State of Game: early access alpha crowdfounding (alpha/beta)

So before I come to the comparison I just wanted to say that I love and played both games and I wished they would be combined to one game that would completely destroy my mind and social life.

Space engine or universe sandbox 2