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 found the Dossiers of each of ARK's initial Specimens!
You reached the maximum survivor level
You tamed a Dinosaur!
You Rode a Dinosaur!
You survived a full day and night on the ARK!
Unlock All Achievements.
Level one of your dinosaurs to the maximum level.
Ride a T-Rex.
Ride a Giganotosaurus.
Personally retrieve all the Artifacts.
Defeat ARK's first Guardian.
Defeat ARK's second Guardian.
Defeat ARK's first three Guardians.
Defeat ARK's third Guardian.
Uncover more than 80% of the Mini-Map.
Reach the highest mountain peak of the ARK.
Reach the bottom of the ARK's oceans.
Cure yourself of Swamp Fever.
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 discovered 10% of the Explorer Notes on the ARK!
You've discovered 20% of the Explorer Notes on the ARK!
Defeat the final boss on Easy difficulty
Defeat the final boss on Medium difficulty
Defeat the final boss on Hard difficulty
Discover 100% of the Explorer Notes on the ARK.
Tame at least one of every tameable creature on the ARK
Defeat the Guardians of The Center