Full list of all 33 ARK: Survival Evolved achievements worth 1,500 gamerscore. It takes around 1-2 hours to unlock all of the achievements in the base game.
The base game contains 18 achievements worth 1,000 Gamerscore, and there is 1 DLC pack containing 15 achievements worth 500 Gamerscore.
You personally retrieved all the Artifacts!
You found the Dossiers of each of ARK's initial Specimens!
You defeated ARK's first three Guardians! And yet...
You defeated ARK's second Guardian!
You defeated ARK's first Guardian!
You defeated ARK's third Guardian!
You've uncovered more than 80% of the Mini-Map!
You rode on the back of a Giganotosaurus!
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!
One of your dinosaurs reached maximum level!
You survived a full day and night on the ARK!
You reached the maximum survivor level
You tamed a Dinosaur!
You Rode a Dinosaur!
Unlock All Achievements.
Cure yourself of Swamp Fever.
You've discovered 100% of the Explorer Notes on the ARK!
You've discovered 90% of the Explorer Notes on the ARK!
You've discovered 80% of the Explorer Notes on the ARK!
You've discovered 70% of the Explorer Notes on the ARK!
You've discovered 60% of the Explorer Notes on the ARK!
You've discovered 50% of the Explorer Notes on the ARK!
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 defeated the Guardians of The Center!
You Ascended off the ARK, at Alpha level!
You Ascended off the ARK, at Gamma level!
You Ascended off the ARK, at Beta level!
Tame at least one of every tameable creature on the ARK