Mass Effect 3: Codex entries - list of all Mass Effect 3 guide, walkthrough
Last update: 29 October 2022
This page of the Mass Effect 3 game guide lists the codex entries you can unlock as you play through the game. In particular, you should be interested in the information in the last column of the tables, which include info on how to get particular entries.
Remark! If the entry is connected with the person that died earlier it isn't possible to unlock it in the most of cases.
ENTRY NAME | SECTION | CATEGORY | UNLOCKING THE ENTRY |
Blackstar | Codex | Weapons, Armor and Equipment | Finding the Blackstar weapon (main quest Priority: Palaven). |
M-560 Hydra | Codex | Weapons, Armor and Equipment | Finding the rocket launch Hydra. |
M-920 Kain | Codex | Weapons, Armor and Equipment | Finding the M-20 Kain (main quest Priority: Earth #2). |
Geth Spitfire | Codex | Weapons, Armor and Equipment | Finding the Geth Spitfire (main quest Rannoch: Admiral Koris). |
Omni-Tool Weapon | Codex | Weapons, Armor and Equipment | First use of Omni-Tool to make a strong hit (main quest Prologue). |
Citadel | Codex | Citadel and Galactic Government | Listening the speak with Anderson (main quest Prologue). |
Spectres | Codex | Citadel and Galactic Government | Listening the speak with Anderson (main quest Prologue). |
Systems Alliance | Codex | Humanity and the Systems Alliance | Initially available. |
Councilor Donnel Udina | Codex | Humanity and the Systems Alliance | Completing the main quest Priority: Citadel. |
Rise of the Alliance | Codex | Humanity and the Systems Alliance | Completing the main quest Priority: Mars. |
Earth | Codex | Humanity and the Systems Alliance | Initially available. |
Thresher Maws | Codex | Aliens: Non-Sapient Creatures | Automatically during going through the catacombs (main quest Priority: Tuchanka). |
Batarians | Codex | Aliens: Non-Council Races | Initially available. |
Drell | Codex | Aliens: Non-Council Races | Initially available. |
Elcor | Codex | Aliens: Non-Council Races | Initially available. |
Get | Codex | Aliens: Non-Council Races | Initially available. |
Hanar | Codex | Aliens: Non-Council Races | Initially available. |
Krogan | Codex | Aliens: Non-Council Races | Initially available. |
Keepers | Codex | Aliens: Non-Council Races | Initially available. |
Quarians | Codex | Aliens: Non-Council Races | Initially available. |
Volus | Codex | Aliens: Non-Council Races | Initially available. |
Asari | Codex | Aliens: Council Races | Initially available. |
Salarians | Codex | Aliens: Council Races | Initially available. |
Turians | Codex | Aliens: Council Races | Initially available. |
Praetorians | Codex | Aliens: Extinct Races | First dialogue with Liara (main quest Priority: Mars). |
Cerberus | Codex | Organizations | First dialogue with Liara (main quest Priority: Mars). |
Cerberus: The Illusive Man | Codex | Organizations | First dialogue with The Illusive Man (main quest Priority: Mars). |
Grissom Academy | Codex | Planets and Locations | Automatically when unlock the secondary quest Grissom Academy: Investigation. |
Gellix | Codex | Planets and Locations | Automatically when unlock the secondary quest Arrae: Ex-Cerberus Scientists. |
Lesuss | Codex | Planets and Locations | Completing the main quest Priority: Citadel #2. |
Menae | Codex | Planets and Locations | Completing the main quest Priority: Citadel. |
Palaven | Codex | Planets and Locations | Completing the main quest Priority: Citadel. |
Rannoch | Codex | Planets and Locations | Completing the main quest Priority: Geth Dreadnought. |
Sur'Kesh | Codex | Planets and Locations | Automatically when reach the salarian's lab (main quest Priority: Sur'Kesh). |
Thessia | Codex | Planets and Locations | Automatically when unlock the main quest Priority: Thessia. |
Tuchanka | Codex | Planets and Locations | Completing the main quest Attican Traverse: The Rachni or Tuchanka: Turian Platoon. |
Normandy SR-2 | Codex | Ships and Vehicles | Completing the main quest Prologue. |
UT-47A Kodiak | Codex | Ships and Vehicles | First dialogue with Liara (main quest Priority: Mars). |
Biotics | Codex | Technology | Initially available. |
Genophage | Codex | Technology | Listening the conversation with Garrus (main quest Priority: Palaven). |
The Genophage Cure | Codex | Technology | Completing the main quest Attican Traverse: The Rachni or Tuchanka: Turian Platoon. |
Medi-Gel | Codex | Technology | Initially available. |
Omni-Tool | Codex | Technology | Initially available. |
Element Zero ("Eezo") | Codex | Technology | Initially available. |
Mass Effect Fields | Codex | Technology | Initially available. |
Mass Relays | Codex | Technology | Initially available. |
The Crucible | Codex | Technology | Completing the main quest Priority: Sur'Kesh. |
Ashley Williams | Codex | Known Associates | Initially available (only if she is alive). |
David Anderson | Codex | Known Associates | Initially available. |
Doctor Karin Chakwas | Codex | Known Associates | First dialogue with doctor Chakwas (Citadel: Huerta Memorial Hospital). |
Doctor Liara T'Soni | Codex | Known Associates | First dialogue with Liara (main quest Priority: Mars). |
Doctor Mordin Solus | Codex | Known Associates | First dialogue with Mordin (main quest Priority: Sur'Kesh). |
EDI | Codex | Known Associates | Taking over the doctor's Eve body by the EDI (secondary quest Normandy SR-2: EDI*). |
Garrus Vakarian | Codex | Known Associates | First dialogue with Garrus (main quest Priority: Palaven). |
Grunt | Codex | Known Associates | First dialogue with Grunt (main quest Attican Traverse: The Rachni). |
Jack | Codex | Known Associates | First dialogue with Jack (secondary quest Grissom Academy: Emergency Evacuation). |
Jacob Taylor | Codex | Known Associates | First dialogue with Jacob (secondary quest Arrae: Ex-Cerberus Scientists.). |
Jeff "Joker" Moreau | Codex | Known Associates | Completing the main quest Prologue. |
Kaidan Alenko | Codex | Known Associates | Initially available (only if he is alive). |
Kelly Chambers | Codex | Known Associates | First dialogue with Kelly (Citadel: Docks - Holding Area). |
Legion | Codex | Known Associates | First dialogue with Legion (main quest Priority: Geth Dreadnought). |
Miranda Lawson | Codex | Known Associates | First dialogue with Miranda (secondary quest Citadel: Miranda Lawson*). |
Samara | Codex | Known Associates | First dialogue with Samara (secondary quest Kallini: Ardat-Yakshi Monastery). |
Steven Hackett | Codex | Known Associates | Initially available. |
Tali'Zorah | Codex | Known Associates | First dialogue with Tali (main quest Priority: Perseus Vail). |
Thane Krios | Codex | Known Associates | First dialogue with Than (Citadel: Huerta Memorial Hospital). |
Zaeed Massani | Codex | Known Associates | First dialogue with Zaeed (secondary quest Citadel: Volus Ambassador). |
Banshee | Codex | The Reapers | First meeting with a Banshee. |
Brute | Codex | The Reapers | First meeting with a Brute (main quest Priority: Palaven). |
Marauder | Codex | The Reapers | First meeting with a Marauder (main quest Priority: Palaven). |
Indoctrination | Codex | The Reapers | First meeting with a soldier changed into a Husk (main quest Priority: Mars). |
Cannibal | Codex | The Reapers | First meeting with a Cannibal (main quest Prologue). |
Harvester | Codex | The Reapers | First meeting with a Harvester (main quest Tuchanka: Turian Platoon). |
Reaper Variants | Codex | The Reapers | Completing the main quest Priority: Citadel. |
Ravager | Codex | The Reapers | First meeting with a Ravager (main quest Attican Traverse: The Rachni). |
Sovereign | Codex | The Reapers | Initially available. |
Husk | Codex | The Reapers | First meeting with a Husk (main quest Prologue). |
Banshee | Codex | The Reapers | Initially available. |
Reapers | Codex | The Reapers | Initially available. |
Mass Accelerators | Secondary Codex | Weapons, Armor and Equipment | Initially available. |
Kinetic Barriers ("Shields") | Secondary Codex | Weapons, Armor and Equipment | Initially available. |
Small Arms | Secondary Codex | Weapons, Armor and Equipment | Initially available. |
Body Armor | Secondary Codex | Weapons, Armor and Equipment | Initially available. |
Tech Armor and Fortification | Secondary Codex | Weapons, Armor and Equipment | Initially available. |
Citadel Space | Secondary Codex | Citadel and Galactic Government | Completing the main quest Priority: Citadel. |
Citadel Council | Secondary Codex | Citadel and Galactic Government | Completing the main quest Priority: Citadel. |
Timeline | Secondary Codex | Humanity and the Systems Alliance | Initially available. |
Systems Alliance: Special Operations | Secondary Codex | Humanity and the Systems Alliance | Completing the main quest Prologue. |
Alliance News Network | Secondary Codex | Humanity and the Systems Alliance | Talk with a Diana Allers (Citadel: Dock D24). |
First Contact War | Secondary Codex | Humanity and the Systems Alliance | Initially available. |
Krogan: Ancient History | Secondary Codex | Aliens: Non-Council Races | Listening the conversation with Garrus (main quest Priority: Palaven). |
Krogan: Krogan Rebellions | Secondary Codex | Aliens: Non-Council Races | Listening the conversation with Garrus (main quest Priority: Palaven). |
Varren | Secondary Codex | Aliens: Non-Council Races | Initially available. |
Vorcha | Secondary Codex | Aliens: Non-Council Races | Initially available. |
Yahg | Secondary Codex | Aliens: Non-Council Races | Initially available. |
Collectors | Secondary Codex | Aliens: Non-Council Races | Initially available. |
Asari: Ardat-Yakshi | Secondary Codex | Aliens: Council Races | Automatically when unlock the secondary quest Kallini: Ardat-Yakshi Monastery. |
Rachni | Secondary Codex | Aliens: Extinct Races | Initially available. |
Cerberus: Atlas | Secondary Codex | Organizations | Destroying first Atlas mech. |
Cerberus: Centurion | Secondary Codex | Organizations | First meeting with a Centurion (main quest Priority: Mars). |
Cerberus: Phantom | Secondary Codex | Organizations | First meeting with a Phantom (Priority: Citadel #2). |
Cerberus: Engineer | Secondary Codex | Organizations | First meeting with an Engineer. |
Cerberus: Nemesis | Secondary Codex | Organizations | First meeting with a Nemesis. |
Cerberus: Guardian | Secondary Codex | Organizations | First meeting with a Guardian (main quest Priority: Mars). |
Cerberus: Trooper | Secondary Codex | Organizations | First meeting with a Trooper (main quest Priority: Mars). |
Mercenaries: Blue Sun | Secondary Codex | Organizations | Completing the secondary quest Citadel: Aria T'Loak*. |
Mercenaries: The Blood Pack | Secondary Codex | Organizations | Completing the secondary quest Citadel: Aria T'Loak*. |
Mercenaries: Eclipse | Secondary Codex | Organizations | Completing the secondary quest Citadel: Aria T'Loak*. |
Aeia | Secondary Codex | Planets and Locations | Initially available. |
Benning | Secondary Codex | Planets and Locations | Automatically when unlock the secondary quest N7: Cerberus Abduction. |
Cyone | Secondary Codex | Planets and Locations | Automatically when unlock the secondary quest N7: Fuel Reactors. |
Feros | Secondary Codex | Planets and Locations | Initially available. |
Haestrom | Secondary Codex | Planets and Locations | Initially available. |
Illium | Secondary Codex | Planets and Locations | Initially available. |
Ilos | Secondary Codex | Planets and Locations | Initially available. |
Korlus | Secondary Codex | Planets and Locations | Initially available. |
Perseus Vail | Secondary Codex | Planets and Locations | Initially available. |
Noveria | Secondary Codex | Planets and Locations | Initially available. |
Omega | Secondary Codex | Planets and Locations | Initially available. |
Ontarom | Secondary Codex | Planets and Locations | Automatically when unlock the secondary quest N7: Communication Hub |
Freedom's Progress | Secondary Codex | Planets and Locations | Initially available. |
Pragia | Secondary Codex | Planets and Locations | Initially available. |
Rakhana | Secondary Codex | Planets and Locations | Initially available. |
Sanctum | Secondary Codex | Planets and Locations | Automatically when unlock the secondary quest N7: Cerberus Lab. |
Terminus Systems | Secondary Codex | Planets and Locations | Initially available. |
Virmir | Secondary Codex | Planets and Locations | Initially available. |
The Migrant Fleet | Secondary Codex | Planets and Locations | Initially available. |
Military Ship Classifications | Secondary Codex | Planets and Locations | Initially available. |
FTL Drive | Secondary Codex | Planets and Locations | Initially available. |
Normandy SR-1 | Secondary Codex | Planets and Locations | Initially available. |
Space Combat | Secondary Codex | Planets and Locations | Initially available. |
Artifacts | Secondary Codex | Technology | Initially available. |
Computers: Artificial Intelligence (AI) | Secondary Codex | Technology | Initially available. |
Computers: Virtual Intelligence (VI) | Secondary Codex | Technology | Initially available. |
The Shroud | Secondary Codex | Technology | Completing the main quest Attican Traverse: The Rachni or Tuchanka: Turian Platoon. |
The Battle of Palaven | Secondary Codex | The Reaper War | Listening the conversation with Garrus (main quest Priority: Palaven). |
The Battle of Rannocha | Secondary Codex | The Reaper War | Completing the main quest Priority: Rannoch. |
The Miracle at Palaven | Secondary Codex | The Reaper War | Completing the main quest Priority: Geth Dreadnought. |
Desperate Measures | Secondary Codex | The Reaper War | Making an interview with a Diana Allers after completing the main quest Priority: Rannoch. |
The Fall of Khar'shan | Secondary Codex | The Reaper War | Initially available. |
The Fall of Taetrus | Secondary Codex | The Reaper War | Completing the main quest Priority: Citadel. |
The Fall of Thessia | Secondary Codex | The Reaper War | Completing the main quest Priority: Thessia. |
The Fall of Earth | Secondary Codex | The Reaper War | Completing the main quest Prologue. |
The Cerberus Coup | Secondary Codex | The Reaper War | Completing the main quest Priority: Citadel #2. |
Reapers Capabilities | Secondary Codex | The Reapers | Completing the main quest Priority: Citadel. |
Reapers Vulnerabilities | Secondary Codex | The Reapers | First meeting with a new type of the Reapers (main quest Priority: Tuchanka). |
Harvesting | Secondary Codex | The Reapers | Completing the main quest Priority: Tuchanka. |