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