Having just finished Far Cry: Primal I am totally in the mood for a Palaeolithic and tribal roleplaying. Searching for a game suitable for this kind of a story proved more difficult though than I had anticipated. After coming into conclusion that either was no such game or none of them were very good I stumbled on the Würm (funded via Kickstarter and co-published by Nocturnal).
Summary: Having (only) read the rulebook I have to say that it has some excellent ideas as well as interesting ideas and at least is an excellent tool box for any game set in this kind of environment.