Microsoft officially announced the next downloadable expansion pack forHalo Wars 2during its Daily Show at E3 2017, and it certainly introduces a significant change to gameplay. EntitledAwakening the Nightmare, the upcomingHalo Wars 2expansion will not only put players in the shoes of The Banished, but also re-introduces the infamous and oft-requested Flood back into the fold. The downloadable content will also introduce two new multiplayer maps, complimented by a duo of new multiplayer leaders.

The new content was revealed with a slick cutscene that showed the rapid demise of a few unfortunate Banished soldiers, who were presumably the first to discover the Flood’s return. Gamers who buy into the DLC should expect more slick visuals from the campaign’s cutscenes as well. These scenes are being developed by Blur, an effects studio that previously provided the cutscenes forHalo 2: Anniversary.

Interested gamers can take a look at theHalo Wars 2: Awakening The Nightmaretrailer below:

Players will be able to construct all-new defensive structures like spiked floors and barricades, which should do well to compliment the RTS game’s existing catalog of structures. New units will also be added, though Microsoft hasn’t revealed what these will be for the time being. The downloadable content also introduces a new horde-like game mode called Terminus Firefight, wherein teams of up to three players face wave after wave of increasing difficult enemies. The official description for the new content describes it as “tower defense-style twist to the beloved wave-basedHalomode,” something that sounds like the perfect compliment for the new Flood adversaries.

We don’t know why the DLC wasn’t shown duringMicrosoft’s 90+ minute press conferenceyesterday, but the new content is sure to make fans ofHalo Wars 2happy. 343 Industries also chimed in with anupdate forHalo 6, stating that although progress was good, the game wasn’t at a state where it was ready to be announced yet.

Awakening The Nightmarewon’t be included as part of theHalo Wars 2season pass, so gamers will have to shell out $20 to pick up the title on Xbox One or PC.

TheAwakening The Nightmareexpansion forHalo Wars 2is due out this fall for Xbox One and PC.