Halo 5: Guardians is getting a big new multiplayer feature dubbed Warzone Firefight, which will enable teams of up to eight players to work cooperatively against huge waves of enemies.

Announced yesterday during the┬áHalo World Championship Finals, the new content from Microsoft and 343 Industries combines the Warzone mode of massive battles in Halo 5 with Firefight, a popular mode from the 2009 game, Halo 3: ODST. Microsoft hopes the new mode will help retain players and inject new life into Halo 5: Guardians, which debuted last fall. Before Halo 5’s launch, the Halo series had sold more than 65 million units since 2001 and generated more than $4.6 billion in sales at retail for Microsoft.

In this mode, the enemy A.I. attacks in increasingly powerful waves for five rounds. Players can use the requisition system from Warzone to gain new capabilities such as weapons, armor, or vehicles during the fighting. And Warzone Firefight will introduce a new class of Mythic bosses to make the challenge harder.

Warzone Firefight is set to debut during the summer.

Halo 5 Guardians Warzone Firefight One on One

Above: Halo 5: Guardians Warzone Firefight One on One

Image Credit: Microsoft