Here is the full list of all 35 Kingdom Wars achievements.
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Acquire 10000 Gold
Build 5 or more houses, huts or residences
Complete any of the tutorial scenarios
Acquire 5000 Wood
Acquire 5000 Food
Construct one of the military buildings available to you
Construct one of the economy buildings available to you
Acquire 5000 Stone
Win a PvP match
Win 10 PvP matches
Win 50 PvP matches
Win 100 PvP matches
Acquire 200 Wealth
Build a large city
Successfully Lay Siege to the Human Capital Dagbor
Successfully Lay Siege to the Orc Capital Makkada
Successfully Lay Siege to the Elven Capital Illas Tiltos
Successfully siege all 3 capitals
Have 5 armies on the world map
Complete over 40 quests
Have all 3 main dragon types in your homeland
Have at least 5 dwarven battalions defending your homeland
Add a player to your Friend list
Accept a co-op siege battle request
Complete your first world map army quest
Establish trade or an alliance with a non-allied city through diplomacy
Visit the Dwarven mines of Dunn Erghast or the Dwarven Marches
Visit the Dragon lands of Sssilistra
Visit the inhospitable land of Bal Ratha or the Desolate Hills
Explore the lands of the Human realm of Teria
Explore the lands of the Elf realm of Nhob'ru
Explore the lands of the Orc realm of Gokkholm
Ally with all NPC towns through Conquest or Diplomacy
Make 5000 gold profit at a town market in one visit