Halo Wars 2 is a real-time strategy game based on the Halo universe and it is the sequel to the 2009 Halo Wars. Players use Spartans, Warthogs and other classic Halo units in order to battle the enemy. A single-player campaign and online multiplayer battles are available. The campaign consists of twelve missions and can also be played cooperatively. Typical mission objectives include surviving waves of enemies, defending structuring and capturing specific targets. There are also various side objectives. Many missions involve leading Spartan supersoldier units as well.
The game once again relies on two factions and is now set in the year 2559. On the one hand there is the human faction United Nations Space Command (UNSC) and on the other a new alien faction called the Banished, replacing the Covenant from the first game. Both factions have leader units with special abilities tied to a cooldown period. These abilities can mass heal or do a lot of damage in a short time. In multiplayer there are multiple game modes for up to six players online or bots.