Here is the full list of all 32 ARK: Survival Ascended achievements.
You tamed all of the domesticable creatures on the ARK!
You've cured yourself of Swamp Fever!
You personally retrieved all the Artifacts!
One of your Dinosaurs reached Maximum Level!
You rode on the back of a Giganotosaurus!
You defeated ARK's first Guardian!
You've defeated ARK's three Guardians! And yet...
You reached the Maximum Survivor Level!
You found the Dossiers of each of ARK's initial Specimens!
You've discovered 20% of the Explorer Notes on the ARK!
You've discovered 30% of the Explorer Notes on the ARK!
You've discovered 40% of the Explorer Notes on the ARK!
You've discovered 50% of the Explorer Notes on the ARK!
You've discovered 60% of the Explorer Notes on the ARK!
You've discovered 70% of the Explorer Notes on the ARK!
You've discovered 80% of the Explorer Notes on the ARK!
You've discovered 90% of the Explorer Notes on the ARK!
You've discovered 100% of the Explorer Notes on the ARK!
You Ascended off the ARK, at Gamma level!
You discovered 10% of the Explorer Notes on the ARK!
You Ascended off the ARK, at Alpha level!
You Ascended off the ARK, at Beta level!
You defeated ARK's third Guardian!
You defeated ARK's second Guardian!
You rode on the back of a T-Rex!
You've reached the highest mountain peak of the ARK!
You've reached the bottom of the ARK's oceans!
You uncovered more than 80% of the Mini-Map!
You Survived a full day and night on the ARK!
You Rode a Dinosaur!
You Tamed a Dinosaur!
You defeated the Guardians of The Center!