Universe Sandbox Legacy is a sandbox simulation that allows players to interact with the universe on a cosmic scale. In this physics-based game, you are an omnipotent who can control the very fabrics of reality, giving you the ability of creation and destruction. 

Alter the laws of physics 

Like a deity that oversees the universe, Universe Sandbox Legacy allows you to manipulate the constraints of physics, letting you influence gravity at will. It also gives you the power to produce black holes and crash galaxies. Furthermore, you can create systems and set the climate for each planet. 

Boasting hyper realistic 3D graphics, this game also offers a step-by-step tutorial for each of the 70 simulators available. However, this game is no longer in the works and has been abandoned by the developer, which means there are no future updates for this simulation. 

Play with the cosmos 

Overall, Universe Sandbox Legacy is an entertaining simulation that lets its players play a God-like role where you can constantly change the laws of physics and manipulate the cosmos at will. Unfortunately, there will be no more updates in the future as it has been abandoned.