Q. much to explore?
It’s a survival game at its core, so exploration is important. But this is for crafting parts and not for interesting world details.
Q. a survival Game?
Yep. There’s even a sandbox mode, but the mechanisms just aren’t compelling enough to work like Rust or Minecraft.
Q. survive From what? Well, good question. There’s no real danger beyond being outed as a Downer, which makes the whole point of survival gameplay kind of moot.