Far Cry Primal
This game takes the concept of prequel too far - set in pre-historic central Europe where man is still fighting the forces of nature to become the dominant species on Earth. This first-person sandbox trades guns for pre-historic tools and weapons with which you can hunt, gather, and tame wild beasts.
Based on Ubisoft's latest Dunia Engine, the game takes advantage of DirectX 11 and is heavily taxing on high-end GPUs.