Bioshock Infinite
An early frontrunner for 2013 "Game of the Year,"
Bioshock: Infinite pulls gamers out of the depths of Rapture and into the heights of Columbia, a bustling metropolis of the early 20th century that floats in the sky, with buildings and localities interconnected through bridges and cable-cars. The shooter is renowned amongst critics for some genuine innovation in gameplay mechanics, the proper handling of NPCs, and a story that will linger long after you've finished the game.
Based on a retrofitted Unreal Engine 3, Bioshock: Infinite takes advantage of the DirectX 11 API, and should be moderately taxing on most GPUs.