Ogre Mercenaries are a campaign gameplay mechanic added for free to Total War: Warhammer II in July 2021.
They can be downloaded for free on Total War Access.
How it works
Ogre Mercenary Camps have a chance to spawn on the campaign map whenever a battle, siege, sacking or razing of a settlement takes place. These will be indicated by an orange glowing circular Maw symbol appearing at a location on the campaign map.
Move one of your armies into the camp, and a dilemma: Talking With Tyrants, will appear that gives you the option to pick between a few different tribes. After you select one, those units will appear for you to recruit - there is an Ogre Mercenaries recruitment button in the bottom center of the screen.
Any faction may recruit Ogre Mercenaries. So this is a way for factions to get access to ranged units or monster units that they otherwise would not have. They can be very effective. However, Ogre Mercenaries cost a lot of money to recruit and upkeep, and they will leave immediately if you are unable to continue paying their upkeep.
Ogre Mercenaries unit roster
Ogre units have the Ogre Charge passive ability. They are all Monstrous Infantry or Monstrous Cavalry.
Introduced in Total War: Warhammer II