Here is the full list of all 17 The Wandering Village achievements.
Lose a villager on a scavenging mission
Produce Black Pudding
Get Onbu's heartrate to go above 6 bpm
Build the Survival Monument
Cut down every tree on Onbu’s back
Pet Onbu
Feed Onbu with the Onbu Feeding Trebuchet
Achieve 100% efficiency with a Berry Gatherer
Build the Onbu Monument
Build the Village Monument
Pet, feed, heal and detox Onbu within one day
Survive until day 100 without building any Air Wells
Reach a population of at least 500 villagers
Reach a population of at least 200 villagers
Survive until day 100 without building any Farms
Survive until day 100 while using the Onbu Feeding Trebuchet a maximum of 3 times
Survive until day 100 without harvesting any Berries