Here is the full list of all 26 Shape of the World achievements.
Do a slow complete playthrough of the game
Complete the game three times
Walk a total of 50,000m
Plant 1,000 trees
Complete the game a second time
Do a fast complete playthrough of the game
Walk a total of 30,000m
Launch toward 15 different cave pots
Find an unmarked monument near the shore
Complete the game
Touch all Mountain monuments
Fly 600m before touching down
Fly 300m before touching down
Urchin Jump !
Touch all Rainforest monuments
Collect all 28 seeds
Walk a total of 15,000m
Destroy 500 trees
Collect 3/4 of the seeds
Take a side route through the swamp cave
Collect half of the seeds
Walk a total of 7,500m
Destroy 50 trees
Fly 150m before touching down
Collect 7 seeds
Plant 100 trees