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