Emperor Edition is the definitive edition of ROME II, featuring an improved politics system, overhauled building chains, rebalanced battles and improved visuals in both campaign and battleEmperor Edition contains all free feature updates since its release in 2013, which includes bug fixes, balancing, Twitch.
Caesar in Gaul is a standalone campaign pack for Total War: ROME II covering Julius Caesars war of expansion against the Gaulish tribes. Players can choose from four playable factions in this conflict: the Gallic Arverni, the Germanic Suebi, the Belgic Nervii and Rome, in a campaign inspired by Caesars Commentarii de bello Gallico (Commentaries on the Gallic war).
Offering a tighter scope in terms of time and geography than Rome II (58-51BC), the Caesar in Gaul Campaign Map is an expanded, more detailed vision of Gaul and the south coast of Britannia.