Here is the full list of all 13 Pan-Pan achievements.
Beat the game.
Hello world. Greet all creatures.
Find the old crashed ship.
Visit most of the places in the world.
Collect 10 fuel seeds.
Collect 1 fuel seed.
Travel 10000 meter in the world.
Deliver a piece to the broken ship.
Steal an egg.
Find the battery part needed to fix your broken ship.
Collect 100 fuel seeds.
Let the stick do the talking. Smack all creatures with the stick.
Smack a lot of stuff with the stick.