Use it as a or a modding utility . But if you truly love the game, buy the DLC on a Steam sale (70-80% off). Not for ethics, but for convenience: no updates breaking your save, no multiplayer isolation, and the quiet satisfaction of supporting the genre’s last great historical strategy franchise.
You still need the base game. The unlocker validates that you own Rome 2 . It does not generate a free copy of the game. rome 2 total war dlc unlocker