That's right, we can set up different rules of physics for each world. But it goes further than that; each world is almost like its own version of the game. We'll have to replace backgrounds, re-scale the parts of our character, fit them together, and so on. It's essentially like going back to square one of our Mars Training Ground.
Our next two worlds will be Gliese 581D and Kepler 186F. These are real exoplanets found by astrophysicists, so we can guess at what the physics and scenery should be (with some embellishments courtesy of imagination).
Gliese 581D was discovered in 2007 and is the fourth planet from the star Gliese 581. It's also on the edge of what's known as the habitable zone. It's theorized that it's a primeval environment with active volcanos. It is also nearly seven times the size of Earth, and only about 20 light-years away from Earth. So, it's going to have some very strong gravity. We'll also make the surface have more traction (as...