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