Here is the full list of all 8 Romance of the Three Kingdoms: Legend of CaoCao(Tactics) achievements.
Train all Commanders from a Banner with six or more Commanders.
Upgrade all Commanders from a Banner that has six or more Commanders.
Try fusing your Artifacts.
Promote your Commanders via Manage Commanders menu.
Recruit all Commanders from a Banner that has six or more Commanders.
Level up all the Commanders on your Commanders List.
Achieve victories in battles.
Conquer other Domains.