Full list of all 51 Destiny achievements worth 1,250 gamerscore. It takes around 150-200 hours to unlock all of the achievements in the base game on Xbox 360.
The base game contains 41 achievements worth 1,000 Gamerscore, and there is 1 DLC pack containing 10 achievements worth 250 Gamerscore.
Earn Crucible Rank 1.
Fully upgrade an Exotic weapon.
Kill 100 Warlocks in PvP.
Earn a first strike kill in PvP.
Obtain and equip a piece of Exotic gear.
Complete a Raid.
Have all armor and weapon slots equipped with Legendary or Exotic gear.
Fully upgrade a Titan Subclass.
Earn the highest tier of completion in 10 public events.
Fully upgrade a Legendary weapon.
Attain Vanguard Rank 3.
Earn Vanguard Rank 1.
Complete a Strike without anyone in your fireteam dying.
Kill 25 Cabal with precision shots in 1 mission without dying.
Attain a Grimoire score of 777.
Kill 25 Fallen with precision shots in 1 mission without dying.
Inspect another player.
Kill 25 Vex with precision shots in 1 mission without dying.
Decrypt 25 Engrams.
Complete a Strike.
Resurrect 5 fallen players.
Dismantle 50 pieces of armor or weapons.
Kill 25 Hive with precision shots in 1 mission without dying.
Reverse a decision you made in an upgrade grid.
Obtain and equip a new personal vehicle.
Kill 5 enemies in 3 seconds.
Kill a champion of the Dark.
Rebuild a Jumpship.
Assist in capturing 50 capture points in Control.
Assist in capturing 20 capture points in Salvage.
Kill 100 Hunters in PvP.
Kill 100 Titans in PvP.
Register 25 kills in PvP with heavy weapons.
Kill a Hunter, Titan, and Warlock without dying in a PvP match.
Complete a Raid with a full fireteam consisting of only your clan members.
Complete a Raid on hard difficulty.
Complete a Raid without anyone in your fireteam dying.
Complete a Strike with a full fireteam consisting of only your clan members.
Discover 50 dead ghosts.
Fully upgrade a Hunter Subclass.
Fully upgrade a Warlock Subclass.
Complete the "Echoes of Oryx" quest.
Complete the King's Fall Raid.
Complete "The Nightstalker's Trail" quest.
Complete "The Court of Oryx" quest.
Complete "The Wolves of Mars" quest.
Complete "The Taken King" quest.
Complete "The Sunbreakers' Challenge" quest.
Complete "The Old Hunger" quest.
Complete "The Stormcaller's Path" quest.
Complete the King's Fall Raid (Heroic).