Full list of all 27 No Man's Sky achievements. It takes around 80-100 hours to unlock all of the achievements in the base game on Windows.
The base game contains 22 achievements, and there is 1 DLC pack containing 5 achievements.
Attain ‘Known’ status in Alien Colonist Encounters
Attain ‘Confused’ status in Words Collected
Attain ‘Trader’ status in Most Units Accrued
Attain ‘Entrepreneur’ status in Most Units Accrued
Attain ‘Novice’ status in Ships Destroyed
Attain ‘Naturalist’ status in Planet Zoology Scanned
Attain 'Trailblazer' status in Space Exploration
Attain ‘Archivist’ status in Planet Zoology Scanned
Attain 'Pioneer' status in Space Exploration
Attain ‘Interpreter’ status in Words Collected
Attain ‘Diplomat’ status in Alien Colonist Encounters
Attain ‘Notorious’ status in Ships Destroyed
Attain ‘Robust’ status in Extreme Survival
Attain ‘Nomad’ status in On-foot Exploration
Attain ‘Encyclopedia’ status in Planet Zoology Scanned
Attain ‘Discoverer’ status in Space Exploration
Attain ‘Magnate’ status in Most Units Accrued
Attain ‘Babelfish’ status in Words Collected
Attain ‘Ambassador’ status in Alien Colonist Encounters
Attain ‘Legend’ status in Ships Destroyed
Attain ‘Everlasting’ status in Extreme Survival
Attain ‘Adventurer’ status in On-foot Exploration
Claim a Base or Buy a Freighter
Visit another Player's Base
Build an Exocraft
Reach the Centre of the Galaxy in Survival Mode
Reach the Centre of the Galaxy in Permadeath Mode