Here is the full list of all 24 Kainga: Seeds of Civilization achievements.
Ride the crustacean in the tutorial
Play as Garam the swift
Play as Achiote and the bodyguard
Play as Ajowan, the appreciator of ceramics
Play as the noble Thinker Charnushka
Play as the Thinker duo known as Kala and Jeera
Play as Galanga, the master of food
Play as Serrano, the author of forbidden knowledge
Visit the grassy cliffs in The Edges
Visit the archipelago in The Pebbles
Visit the great ice mountain known as Ice Ridge
Visit the unreal lands known as The Towers
Visit the lush lands of Greenleaf
Visit the massive trees of Darkwood
Experience the Dead of Night
Try every unit in Kainga
Complete the arena challenge 5 times
Complete the landmarks challenge 5 times
Successfully rescue a Thinker in the rescue challenge 5 times
Try every festival in Kainga at least once
See every beast in Kainga
Become fully allied with a neighbor
Grow a village to a city with a population of 60
Purchase all the basic technologies from the karma shop