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