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