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.
Complete 30 challenges.
Collect 15 Red War exotic weapons or armor.
Complete a Flashpoint on Earth, Titan, Nessus, or Io.
Encounter an Agent of the Nine somewhere in the system.
Complete a Nightfall strike.
Complete Introduction: Crucible.
Complete a Heroic public event.
Reach level 20.
Acquire each Warlock subclass.
Complete the "Last Wish" Raid.
Complete a Triumph Seal.
Defeat a Forsaken Nightfall Boss.
Collect 10 Forsaken Exotic weapons or armor.
Complete a Forsaken Exotic Quest.
Pursue Uldren and the Fanatic to the Watchtower, and finish what you started.
Complete a Collections Badge.
Win a Gambit match.
Enter the Dreaming City.
Earn 5,000 Triumph points.