Halo Wars 2: Awakening the Nightmare

Halo Wars 2 : Awakening the Nightmare is a digital expansion for Halo Wars 2, which features a new campaign and a new cooperative mode known as Terminus Firefight. In addition, Awakening the Nightmare will also include two new Banished Leaders and two new standard multiplayer maps. The expansion is set to be released in fall 2017 for $19.99 USD exclusively on Xbox One and Windows 10 PC, and is not part of the seasonal pass of the game.

Description
The brand new campaign, which includes new cutscenes by Blur Studio, takes place after the main game, just a few months after the conflict between the Banished and survivors of the. The game's campaign missions will explore the Banished and their desperate struggle against the return of a terrifying and ancient enemy – the Flood.

In Terminus Firefight mode, up to three players can cooperate in defending their bases and a Forerunner terminus node against waves of hostile UNSC, Banished and Flood forces. The mode, as well as the new leaders, were playable at the 2017 Electronic Entertainment Expo.

Source

 * Halo Waypoint News - Introducing Halo Wars 2: Awakening the Nightmare