Here is the full list of all 32 ARK: Survival Evolved achievements. It takes around 200 hours to unlock all of the achievements on Windows.
You Ascended off the ARK, at Gamma level!
You Ascended off the ARK, at Beta level!
You defeated the Guardians of The Center!
You Ascended off the ARK, at Alpha level!
You tamed all of the domesticable creatures on the ARK!
You found the Dossiers of each of ARK's initial Specimens!
You've cured yourself of Swamp Fever!
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 rode on the back of a Giganotosaurus!
You've discovered 40% of the Explorer Notes on the ARK!
You've discovered 30% of the Explorer Notes on the ARK!
You've discovered 20% of the Explorer Notes on the ARK!
You discovered 10% of the Explorer Notes on the ARK!
You personally retrieved all the Artifacts!
You uncovered more than 80% of the Mini-Map!
You've reached the highest mountain peak of the ARK!
One of your Dinosaurs reached Maximum Level!
You've reached the bottom of the ARK's oceans!
You've defeated ARK's three Guardians! And yet...
You defeated ARK's third Guardian!
You rode on the back of a T-Rex!
You reached the Maximum Survivor Level!
You Survived a full day and night on the ARK!
You Rode a Dinosaur!
You Tamed a Dinosaur!
You defeated ARK's second Guardian!
You defeated ARK's first Guardian!