Here is the full list of all 18 Havendock achievements.
Own a talking penguin
Visit Bird Island
Catch a salmon with a Fishing Rod
Get a golden retriever
Build 500 structures on decks
Have 50 settlers
Have 50 bots
Completed 80 researches
Make the final construction and finish the game.
Reach 100% friendship on 6 traders
Use a Clone Potion Lv3
Use a Dynamite
Turn into a Chick
Ride the mother kewi
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