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