A massively open-world game devoted almost 100% to pure exploration. Perhaps you are a spacefaring botanist or the like visiting another world. Minimal combat--any native fauna should behave like true animals, running away at the first sign of hostility or threat on your part, with only a few large animals being aggressive or territorial enough to actually pursue you. Mostly you just observe them, probably taking photographs of animals, samples of soil, plants, etc. The dangers would mostly be in not knowing what's poisonous versus what's safe, and natural hazards like quicksand, falling if you are climbing a difficult area or tree, sudden dropoffs in deep water, etc.
Maybe you find the ruins of a civilization there, but no real people. You could explore the ancient cities, wandering amongst decayed buildings and wondering what happened. Or maybe you don't, and just venture through the wilderness, seeing what strange and wonderful things there are to see.
All the games resembling this that I know of are all about making the native life outrageously hostile for no adequately explained reason. Space-wolves are apparently perpetually starving, immune to pain, and will always choose the absolutely most difficult prey even if offered an easy and familiar alternative, I guess.