The big downside was the rather fickle and dumb AI, whose cluelessness in times of war led to some hilarious moments. Civilization 6 brought some big ideas when it released in 2016 with the introduction of Districts – city improvements that occupied their own tiles instead of sitting atop the city tile, a revolutionary concept for the series – completely changing how players viewed the location of a new settlement, and new systems such as Eureka and Inspiration playing a huge role in allowing for non-domination victories.