Flint, Blood, Bone

In this game you play as members of an Upper Paleolithic band of hunter gatherers 42 thousand years ago, roaming the wilds of Europe. You have each been inducted into the Wolf Brotherhood, a secret society of hunters. But this world is dark and hard, and you will struggle to survive. Within are included rules for making your character, playing in the paleolithic world, a sample clan, and expansions for encounters with Neanderthals, Cannibals, and the Cthulhu Mythos.

This one sheet rpg has all you need to play except for a handful of six sided dice.