Here is the full list of all 10 Sunset Kingdom achievements.
Win the game
Have 50+ gold coins in stock
Build 50+ roads/bridges
Turn a town into a capital
Build a bridge
Build 4 castles
Research all perks
Have 50k+ food stockpiled and have at least 3 towns on 50+ food consumption when a new moon starts
Win the game in less than 1.5 hours game time
Win the game with no civilian casualties