Starcraft 2: Legacy of the Void introduced a new Gamemode: Allied Commanders.
Allied Commanders is a new gamemode utilizing the Warcraft RTS mechanic of Heroes. Allied Commanders will have 3 commanders currently revealed, one for each race. Players will be able to play by themselves or co-op.
Within the Allied Commander Gamemodes, there will numerous other game mechanic such entering an UI allowing the player to target locations for Orbital Strikes if they play Raynor.
Allied Commanders come in numerous difficulties that you can select before the start of a mission. Allied Commander also has more replay value by allowing players to customize their Commanders by gaining new skill levels unlocking new arsenal of weapons and units to utilize throughout the game.