Boss Raid is a game mode where you work together with other players to defeat bosses zombies, whose health has been massively inflated compared to campaign and survival. In addition, after a certain amount of time has passed, bosses will summon smaller zombies.
Players are given one first aid pack which can be used to revive a player by standing over them.
There are 7 Bosses:
Elite Flamethrower Zombie
Elite Shield Zombie