The Stone Age stabber clubs the competitionUbisoft took a risk stripping the guns from Far Cry and swapping them out for clubs, spears and remote-controlled owls, but it seems to have paid off, with the game taking the number one spot in the UK charts.
Call of Duty: Black Ops 3 has seen its 11-week run at the top moved down three places, with The Legend of Zelda: Twilight Princess HD at number two and Plants vs Zombies: Garden Warfare 2 - a game with its roots (sorry) in a Call of Duty pun - at number three.
FIFA 16 and Call of Duty: Black Ops 3 are still hanging into the top five, with Black Ops 3 in fourth and FIFA 16 in fifth.
Here are the charts in full:1. Far Cry Primal
2. The Legend of Zelda: Twilight Princess HD
3. Plants vs Zombies: Garden Warfare 2
4. Call of Duty: Black Ops 3
5. FIFA 16
6. LEGO Marvel Avengers
7. Grand Theft Auto V
8. Heavy Rain & Beyond Two Souls Collection
9. Tom Clancy's Rainbow Six Siege
10. Forza Motorsport 6
11. Street Fighter V
12. Star Wars Battlefront
13. Minecraft: Xbox Edition
14. Assassin's Creed Syndicate
15. LEGO Jurassic World
16. Minecraft: Story Mode
17. Minecraft: PlayStation Edition
18. Fallout 4
19. Halo 5: Guardians
20. WWE 2K16
Leisure software charts compiled by Chart Track