Skara

Skara is an open-world survival game set in prehistory, contained within a single level with no loading screens. You explore freely in any direction as Skara, who must find food and defend herself from living and dead enemies. Different enemies require different attacks, though you can run from a fight if you stay aware of your surroundings.

The game ends when you quit and starts anew the next time you play; there are no saves between playthroughs.