The Halo Wars 2 base game is required to play the expansion. The Awakening the Nightmare DLC Expansion is not included in the Season Pass. In Halo 3: ODST, the same rules still apply from Halo 2, though certain NPCs are playable in some campaign levels (for example, Tayari Plaza is told from Gunnery Sergeant Edward Buck's point of view, but he is an NPC ally in NMPD HQ). You’ll have to strategize to survive, especially if you want to make it to the top of the leaderboards. Terminus Firefight allows for you and up to two other players to defend your base against deadly waves of Banished, UNSC, and Flood units including new boss units. This Expansion includes a new single player and co-op campaign with ultra-realistic cinematics, two new multiplayer leaders to use in Blitz and traditional multiplayer, and a brand-new tower defense firefight mode called Terminus Firefight. allows you to play as a grunt against humans,covenant,flood and sentinels. Following the events of Halo Wars 2, now you can play as the legendary Banished and lead Pavium and Voridus in a fight for survival against an ancient enemy – the Flood. Halo Wars 2 also supports Xbox Play Anywhere: Buy once, play on both Xbox and. Not an American user? Description Microsoft Store Description (from Ad Blurbs)Awakening the Nightmare is an entirely new chapter in the Halo Wars universe.