The Eternal Lords Expansion Add-on for Age of Wonders III has 21 achievements.
Win any level with a Tigran leader
Recruit a Necromancer hero
Max out the race governance for one race in a single game
Summon an Arch Angel
Win the Eternal Lords campaign for the Undead
Win the Eternal Lords Campaign for the Shadowborn
Win the Eternal Lords Campaign for the Frostlings
Win any level with the Necromancer leader class
Kill a leader with Invoke Death
Research Harbingers of Death
Animate a ruined town
Summon a Dread Reaper
Win any level with a Frostling leader
Have six Tigran cities in a single game
Summon a Fallen Angel
Win any level with a Shadowborn leader
Win any level with a Keeper of Peace leader
Summon a Chthonic Guardian
Win any level with a Grey Guard leader
Obtain a Reef Colony
Win a unifier victory