Full list of all 23 Destiny 2 achievements. It takes around 200 hours to unlock all of the achievements in the base game on Windows.
The base game contains 13 achievements, and there is 1 DLC pack containing 10 achievements.
Complete the Leviathan raid on Prestige difficulty.
Complete the Leviathan raid.
Acquire each Hunter subclass.
Acquire each Titan subclass.
Encounter an Agent of the Nine somewhere in the system.
Reach level 20.
Complete Introduction: Crucible.
Complete a Heroic public event.
Collect 15 Red War exotic weapons or armor.
Acquire each Warlock subclass.
Complete a Flashpoint on Earth, Titan, Nessus, or Io.
Complete a Nightfall strike.
Complete 30 challenges.
Complete a Triumph Seal.
Pursue Uldren and the Fanatic to the Watchtower, and finish what you started.
Complete a Forsaken Exotic Quest.
Complete the "Last Wish" Raid.
Defeat a Forsaken Nightfall Boss.
Collect 10 Forsaken Exotic weapons or armor.
Enter the Dreaming City.
Complete a Collections Badge.
Earn 5,000 Triumph points.
Win a Gambit match.