I have been using Unity 3D for long, and in the past month I have tried Unity Car physics but I see Unity is not the right engine for car games, After I saw BeamNG I just insisted to use its game engine, I have searched a bit and found the game is made in Torque3D, But how can I port BeamNG physics in Torque 3D if I want to make a car game for example.(I only do tests btw)
Beamng is already in torque3d, a highly modified version of it tho. and its not open source. its not really possible if you mean make a game with the beamng physics. the devs could probably explain this better then me but im pretty sure its not gonna happen.
I believe BeamNG's physics are proprietary. I imagine eventually the BeamNG team would be willing to licence out their physics engine, but that's not the case right now as they're still working on it. But why not just mod the BeamNG game as it stand right now to do what you need? What do you need that could not be done via modding BeamNG.Drive? If you really wanted your own game, this is what the Open Source stuff the BeamNG team has worked on: https://github.com/BeamNG?page=1
What about the old BeamNG(Rig of Rods) its open source actually! How can I integrate the physics in a game engine like Cry Engine for example?
I have seen some old books about space(nowadays articles) and they were free actually! How can I build a satellite to orbit a planet like Venus for example?
You still haven't explained why you need a whole new game. You can build your own vehicles and landscapes, you can alter gravity, you can slow down time in this game. Look at the creations modders of this game have made. You could be one too. Rigs of Rods has it's own forums if you'd like to talk about that game.
Bro... this is an ambitious endeavor... if you have anywhere near the programing skill for this and the free time to do it, Rigs of Rods is currently still under heavy development. I would go to the web site and start asking around. If you think you have the skill to pull off something like that, they might be willing to just go with it and help convert the whole game.