Here is the full list of all 8 Romance of the Three Kingdoms: Legend of CaoCao(Tactics) achievements.
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.
Try fusing your Artifacts.
Promote your Commanders via Manage Commanders menu.
Upgrade all Commanders from a Banner that has six or more Commanders.
Train all Commanders from a Banner with six or more Commanders.