XCOM 2 - War of the Chosen is the first full-blown expansion pack for XCOM 2. War of the Chosen adds three additional factions - Reapers, Skirmishers and Templars, as well as a new enemy known as 'The Chosen'. New environments, enemy threats and mission adjectives provide XCOM 2 with more varied long-term gameplay.
PC System Analysis For XCOM 2 - War of the Chosen Requirements
By comparison, XCOM 2 and the War of the Chosen DLC is far more demanding than its predecessor XCOM: Enemy Unknown. While the top-down viewpoint and turn-based nature suggest otherwise, XCOM 2 - War of the Chosen will take advantage of capable GTX 900-series and Radeon R300-series graphics cards. Beware the MSAA option, even the GTX 980 Ti struggles with this forced downsampling effect.