Batman: Arkham Knight
While its console version won accolades for excellent gameplay and presentation, the PC version of Batman: Arkham Knight has been plagued with crippling bugs that affected its release and distribution. The latest version is good enough for single-GPU systems, and we didn't notice any issues that affected our bench since it did yield reliable scores.
Based on the Unreal Engine, Arkham Knight takes advantage of DirectX 11 and is built for "new-generation" hardware. It should be fairly taxing on modern systems.