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