Here is the full list of all 18 Havendock achievements.
Steal and sell Cattleman Josh’s shirt back to him
Equip a settler with a Moon Bunny Costume
Have 50 bots
Have 50 settlers
Use a Dynamite
Turn into a Chick
Build 500 structures on decks
Use a Clone Potion Lv3
Ride the mother kewi
Upgrade a settler’s trait to level 5
Make the final construction and finish the game.
Reach 100% friendship on 6 traders
Completed 80 researches
Get a golden retriever
Visit Bird Island
Own a talking penguin
Catch a salmon with a Fishing Rod
Have a settler with a Level 15 trait