Land on a world of a real star system, walk it to the horizon, kill what is out there, and wear what it drops. The other planets of the system are in the sky above you.
A whole planet, a level band for every region, packs with champions and rares in them, dungeons you go down into, and 12 factions who all remember what you did. Gear you do not want recycles into the materials the crafting bench builds better gear out of. The game saves itself as you play.
The class is locked in for the whole run.