Here is the full list of all 35 PixARK achievements.
A poor creature was killed by you
Get a good partner
Rex is not the most dangerous animal,but you are
Explorered the DoomLand
Take those treasure away
Collected your first cloth
Quetzalcoatius is the one you must needed
Now you have killed the strongest creature in this plant.
You are the strongest man in this plant
Killed a Behemoth
Killed a Large Sea Slime(Ruins)
Killed a Mummy King(Ruins)
Killed a Ice Fairy(Ruins)
Get a Mediterranean blueprint
Get a Bamboo blueprint
Get a MagicAcademy blueprint
Get a Weastern blueprint
Get a Executive blueprint
Get a Scuba Equipment
Get a ArmadilloShell Equipment
Get a MolePick
Get a FlashStick
Dig the Ruins in Grassland and get a Ruins cube
Dig the Ruins in Desert and get a Ruins cube
Dig the Ruins in Frozenland and get a Ruins cube
Dig the Ruins in Swamp and get a Ruins cube
Dig the Ruins in Swamp underground and get a Ruins cube
Dig the Ruins in Ocean and get a Ruins cube
Tamed a Sauropod
Killed a Cyclops
Tmade a BabyTreant
Get something from the Supply Crate
Open a highest level Chest in Ruins