Cool generic GURPS caveman lifted from the GURPs forums:
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Joe the Cave Man
Setting: 125,000 to 32,000 B.C.
ST: 12 [20]; DX: 9 [-10]; IQ: 10 [0]; HT: 10 [0] Attributes: 30 Advantages: 10 Disadvantages: -30 Skills: 15 TOTAL: 25 Advantages: Alertness +2 [10] Disadvantages: Sense of Duty (Religious beliefs) [-5]; Short Lifespan [-10]; Unluckiness [-15] Skills: Axe/Mace-8 [1]; Naturalist-10 [4]; Spear-9 [2]; Spear Throwing-10 [2]; Stone Knapping-10 [2]; Tracking-9 [2]; Traps-9 [1]; Weather Sense-9 [1] Gear: Early stone-tipped spear (thr+1, +1 2-h or thrown, Acc 2, 1/2 Dam 12, Max 18); hafted axe (sw+1); cloak; loincloth; boots; flint sparker; stone scraper; sack; waterskin
Notes: This represents a Neandertal hunter, but could be used, with minor changes, as a Cro-Magnon hunter. The character could also be used in a Lost World or fantasy campaign as a primitive local.