
The Mortal Empires and Immortal Empires campaigns - these are only available if you own both the first two and all three games, respectively.Some of the free DLC packs for the second game add new features, such as new maps for multiplayer games and the Ogre Mercenaries function.The pack for the third game, however, costs money regardless.

They are all called "Blood for the Blood God." The version for the second game is given for free if you own the version for the first game.

These usually coincide with updates that add content to the game anyway, but only by purchasing the packs themselves will you be able to play as the new additions.
