I recently purchased Paleomythic, a bone and sorcery RPG. I already own Würm, an RPG set in the Ice Age, but while Würm is inspired by our current understanding of our Cro-Magnon and Neanderthal ancestors, Paleomythic leans hard into stone and sorcery. I haven’t read the rules, but I’m guessing Robert E. Howard’s Kull is an influence. In any case, great fun!