There are a total of 62 Dead Ghosts in Destiny. Finding 50 of these collectibles will earn you the "Ghost Hunter" Trophy / Achievement.
They are saved automatically and instantly when you pick them up. Once found, they will be gone from the game world. Finding the ghosts is also going to increase your Grimoire score.
None of them are missable! You can pick them up in free roam or during story missions at any time.
This video guide shows everything in free roam.
#1 - Ghost Fragment: Darkness - 0:05
#2 - Ghost Fargment: Fallen - 0:58
#3 - Ghost Fragment: The Dark Age - 1:31
#4 - Ghost Fragment: Darkness 3 - 2:20
#5 - Ghost Fragment: Traveler 3 - 3:27
#6 - Ghost Fragment: Cosmodrome 2 - 4:38
#7 - Ghost Fragment: Jupiter - 5:35
#8 - Ghost Fragment: Abilities - 6:19
#9 - Ghost Fragment: Legends 2 - 7:08
#10 - Ghost Fragment: Human - 7:49
#11 - Ghost Fragment: Mysteries - 8:49
#12 - Ghost Fragment: Earth - 9:43
#13 - Ghost Fragment: Cosmodrome - 10:05
#14 - Ghost Fragment: Exo Stranger - 10:56
#15 - Ghost Fragment: Hunter - 11:40
#16 - Ghost Fragment: The Last World 2 - 12:23
#17 - Ghost Fragment: Fallen 2 - 13:34
All Destiny Trophies and Achievements:
Obtain all trophies in Destiny.
Change of Heart
Reverse a decision you made in an upgrade grid.
Rebuild a Jumpship.
Bane of the Emperor
Kill 25 Cabal with precision shots in 1 mission without dying.
Decrypt 25 Engrams.
Use of Weapons
Dismantle 50 pieces of armor or weapons.
The Life Exotic
Obtain and equip a piece of Exotic gear.
A New Steed
Obtain and equip a new personal vehicle.
Suited for War
Have all armor and weapon slots equipped with Legendary or Exotic gear.
Bane of the Kell
Kill 25 Fallen with precision shots in 1 mission without dying.
Attain a Grimoire score of 777.
Bane of the Dead
Kill 25 Hive with precision shots in 1 mission without dying.
Inspect another player.
Blink of an Eye
Kill 5 enemies in 3 seconds.
Earn the maximum weekly Vanguard score.
Earn the maximum weekly Crucible score.
Earn the highest tier of completion in 10 public events.
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.
Kill 100 Warlocks in PvP.
Ask Questions Later
Earn a first strike kill 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.
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.
Attain Vanguard Rank 3.
A Friend Indeed
Resurrect 5 fallen players.
Complete a Strike.
Strength of the Pack
Complete a Strike with a full fireteam consisting of only your clan members.
Complete a Strike without anyone in your fireteam dying.
Discover 50 dead ghosts.
Kill a champion of the Dark.
Fully upgrade a Hunter Subclass.
Fully upgrade a Titan Subclass.
Fully upgrade a Warlock Subclass.
Fully upgrade an Exotic weapon.
Fully upgrade a Legendary weapon.
Bane of the Machines
Kill 25 Vex with precision shots in 1 mission without dying.