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Codex Entry Guide

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Finding Codex entries adds to experience and gives greater insight into the game. The following is a list of every known Codex entry in Mass Effect, along with locations they are found.

Some entries are attainable in multiple ways, but it should still be possible to get all of the entries in a single play-through.

See also: Scholar Achievement Guide


Primary Edit

Entry Location
Aliens: Council Races
Asari
Salarians Complete the cutscene showing Saren's hearing in front of the Citadel Council.
Turians Available at beginning.
Aliens: Extinct Races
Protheans Ask Captain Anderson and Nihlus about the Protheans at the first briefing.
Rachni
Aliens: Non-Council Races
Batarians
Elcor
Geth Ask Ashley about the geth when you first meet her.
Hanar
Keepers
Krogan
Quarians
Volus
  • Ask Ambassador Din Korlack about the volus; or
  • Ask Avina about why the volus were the first to be granted an embassy.
Aliens: Non-Sapient Creatures
Husks Encounter the first Husks at Eden Prime.
Thresher Maws
  • Examine an Alliance marine after killing a Thresher Maw on Edolus; or
  • Examine the xenobiological database in the contaminated lab at Peak 15.
Varren
Citadel and Galactic Government
Citadel Finish the cutscene concluding Eden Prime.
Citadel Council Finish the cutscene after arriving at the Citadel.
Citadel Space Examine the Galaxy Map.
Spectres
Humanity and the Systems Alliance
Earth
First Contact War
Systems Alliance Available at beginning.
Planets and Locations
Planets: Feros
Planets: Ilos
  • Received from Liara after she fully interprets the Ilos vision following Virmire; or
  • while reaching Ilos.
Planets: Noveria
Planets: Virmire Received after getting the Virmire lead from the Council.
Region: Terminus Systems Ask Anderson and Nihlus about the Terminus Systems at the first briefing.
Uncharted Worlds
Ships and Vehicles
FTL Drive Ask Engineer Adams about the Normandy and then the Tantalus Core after you've taken command.
Military Ship Classifications Ask Engineer Adams about his personal history after you've taken command of the Normandy.
Normandy Ask Joker about the Normandy after you've taken command.
Sovereign Received after speaking to Shiala or Matriarch Benezia.
Space Combat Examine a gunnery station on the Normandy (near Joker) after completing one mission.
Vehicles: M35 Mako Examine the Mako in the Normandy's garage.
Technology
Biotics Ask Doctor Chakwas about Alenko, then L2s.
Computers: Artificial Intelligence (AI)
Computers: Virtual Intelligence (VI) Speak to any incarnation of Avina on the Presidium.
Element Zero ("Eezo")
Mass Effect Fields Examine the Field Integrity monitor in Normandy Engineering.
Mass Relays Ask Avina near the Citadel Tower about the Relay Monument.
Omni-tool Ask the Normandy Requisitions Officer about equipment.
Weapons, Armor and Equipment
Body Armor Collect body armor from the field.
Kinetic Barriers ("Shields") Examine Richard L. Jenkins' body after first combat.
Mass Accelerators Inspect the Normandy weapons while it's docked at the Citadel after you’ve taken command.
Medi-Gel
Small Arms

Secondary Edit

Entry Location
Player Tutorials
01: Basic Controls All tutorial entries are available from the beginning.
02: Combat
03: The Tactics HUD
04: Character Advancement
05: Equipment
06: Armor and Shields
07: Decryption and Electronics
08: The Area Map
09: The Galaxy Map
10: Conversations
11: Vehicle Movement
12: Vehicle Combat
13: Cargo Bay Resources
Personal History Summary
Profile Available at beginning.
UPDATE: Bring Down the Sky
Technology: Translation After the first encounter with batarians.
UPDATE: Pinnacle Station
Technology: Combat Simulator Complete a combat mission at Pinnacle Station.
Technology: Pinnacle Station Land at Pinnacle Station.
Technology: Prefabricated Structures Visit Shepard's apartment on Intai'sei.
Aliens: Council Races
Asari: Biology Pursue a relationship with Liara T'Soni, get this entry after three missions.
Asari: Culture Ask Liara T'Soni about asari culture after saving her. (May depend on dialog choices.)
Asari: Government Ask Liara T'Soni about herself after saving her (dependent on dialogue choices).

Pick : "You must get lonely." and then "Why's that?".

Asari: Military Doctrine
  • Speak to Shiala in Zhu's Hope after completing Feros; or
  • Hack the "Asari Intel Report" terminal on Virmire
Asari: Religion Speak to Liara T'Soni after completing two missions.
Salarians: Biology

Speak to Kaidan Alenko after completing three missions.

Salarians: Culture Hack an antenna in the Salarian base on Virmire (need Decryption on Shepard).
Salarians: Government Speak to Captain Kirrahe.
Salarians: League of One Find any League of One insignia.
Salarians: Military Doctrine
  • Hack the "Salarian Intel Report" terminal on Saren's base (easy decryption); or
  • Received after speaking to Captain Kirrahe.
Salarians: Special Tasks Group Ask the Council about STG during the pre-Virmire briefing.
Turians: Biology Ask Garrus about Dr. Saleon after two missions.
Turians: Culture Ask Garrus about his C-Sec background after completing one mission. (May depend on dialog choices.)
Turians: Government Talk to Garrus after three missions.
Turians: Military Doctrine *Ask Garrus about his C-Sec background after completing one mission. (May depend on dialog choices.); or
Turians: Religion Talk to Garrus after completing three missions and Garrus: Find Dr. Saleon. (Must have successfully convinced him to either be more Paragon or more Renegade)
Turians: The Unification War Find any turian insignia.
Aliens: Extinct Races
Protheans: Beacon Ask Liara T'Soni about herself, after completing one mission.
Protheans: Cipher Received after Liara touches Shepard's mind or after speaking to Shiala.
Protheans: Data Discs Find any Prothean data disc.
Protheans: Mars Ruins Examine Mars from the Galaxy Map.
Aliens: Non-Council Races
Geth: Armatures Fight a Geth Armature.
Geth: Hoppers Fight a Geth Hopper.
Krogan: Biology Speak to Urdnot Wrex after completing Wrex: Family Armor.
Krogan: Culture Ask Urdnot Wrex about his family, and his armor after two missions.
Krogan: Genophage
  • Ask Urdnot Wrex about the genophage while aboard the Normandy; or
  • received after speaking to Captain Kirrahe on Virmire.
Krogan: Krogan Rebellions Ask Avina about the Rebellions at the Krogan Monument.
Krogan: Military Doctrine Talk to Urdnot Wrex after three missions.
Quarians: Economy Ask Tali'Zorah nar Rayya about ship technology after you've taken command of the Normandy.
Quarians: Government Ask Tali'Zorah nar Rayya about the quarians after you've taken command of the Normandy.
Quarians: Law and Defense Talk to Tali'Zorah nar Rayya after two missions (don't complete Tali and the Geth before).
Quarians: Migrant Fleet
Quarians: Pilgrimage Ask Tali'Zorah nar Rayya about her Pilgrimage at the initial meeting.
Quarians: Religion Talk to Tali'Zorah nar Rayya after two missions (don't complete Tali and the Geth before).
Citadel and Galactic Government
Citadel Conventions Examine the Diplomatic Archive terminal in the diplomats' office at the Embassies.
Citadel Station: Citadel Security Services (C-Sec)
Citadel Station: Presidium Ring
Citadel Station: Serpent Nebula Examine the Serpent Nebula from the CitadelWards.
Citadel Station: Statistics Finish the cutscene concluding Eden Prime.
Citadel Station: Wards Ask Barla Von about the Citadel, and then the Wards.
Treaty of Farixen Examine terminals in the diplomats' office at the Embassies.
Humanity and the Systems Alliance
Genetic Engineering
Human Diplomatic Relations
Systems Alliance: Geological Survey Survey any mineral deposit, either from space or planet-side.
Systems Alliance: Military Doctrine Talk to Ashley Williams after two missions.
Systems Alliance: Military Jargon Examine NAVMANUAL 1.4.1 on the Normandy's command deck.
Systems Alliance: Military Ranks Examine the personnel manual in the captain's office aboard the Normandy after you've taken command.
Systems Alliance: N7 Examine Shepard's locker on the Normandy's habitation deck.
Terra Firma Party Speak to Ashley Williams or Charles Saracino.
Timeline Available at beginning.
Planets and Locations
Stations: Arcturus Station Speak to Joker about his history.
Stations: Gagarin Station Ask Kaidan Alenko about his training after completing one mission.
Ships and Vehicles
FTL Drive: Appearance Look out of the viewport on the Normandy's bridge.
FTL Drive: Drive Charge Examine core charge status in Normandy engineering after completing one mission.
Space Combat: Combat Endurance Examine the heat load monitor on the Normandy's command deck after finishing one mission.
Space Combat: General Tactics
  • Access the computer terminal on the second floor of the main base on Xawin; or
  • Examine NAVMANUAL 0.7.4 in the Udina's Office after finishing one mission.
Space Combat: Planetary Assaults Ask Ashley about her family history after a third mission.
Space Combat: Trans-Relay Assaults Speak to the Prothean VI Vigil on IIos.
Starships: Carriers Speak to Rear Admiral Mikhailovich and select "We need to kick ass." (requires 9 Intimidate points).
Starships: Crew Considerations Examine the crew sleeper pods on the Normandy's habitation deck after you've taken command.
Starships: Cruisers Examine a second tracking terminal in C-Sec Traffic Control.
Starships: Dreadnought
Starships: Fighters Examine a tracking terminal in C-Sec Traffic Control.
Starships: Frigates
Starships: Heat Management Examine a second heat load monitor on the Normandy's command deck after completing one mission.
Starships: Sensors
Starships: Thrusters Inspect the Normandy thrusters while it's docked at the Citadel after you’ve taken command.
Vehicles: Combat Drones Examine the data port inside one of the Rogue VI stations.
Weapons: Ablative Armor Inspect the Normandy hull while it's docked at the Citadel after you’ve taken command.
Weapons: Disruptor Torpedoes
  • Examine the Gravitic Weapons Research terminal in Peak 15's cafeteria; or
  • on Virmire, examine Rana Thanoptis' terminal in room leading to Saren's personal laboratory.
Weapons: GARDIAN Examine the point defense systems on the Normandy command deck after completing one mission.
Weapons: Javelin Speak to the Prothean VI Vigil on IIos.
Technology
Biotics: Biotic Amps Ask Doctor Chakwas about Alenko, then L2s.
Biotics: Life as a Biotic Ask Kaidan Alenko about his training after completing two missions (dependent on dialogue choices). When he mentions Conatix, select "Tell me about it." or "Angry?".
Biotics: Training Ask Kaidan Alenko about his training after completing one mission.
Communications Examine the FTL Comm Link in the Normandy comm room.
Communications: Administration
  • Examine the extranet terminal in the freighter on Feros; or
  • examine the public extranet terminal at the Port Hanshan Plaza, in the lounge area with the inaccessible elevator between the elevator to the hotel and Opold's shop; or
  • examine the extranet terminal near Officer Eddie Lang in the Wards.
Communications: Methodology
Credits ("Creds") Ask Barla Von about what he does.
Weapons, Armor and Equipment
Upgrades Collect any upgrade from the field.
SmallMLogo Mass Effect Guides SmallMLogo
Completion WalkthroughMoralityExperienceSystemsMakoCodex
Achievements CompletionistRich AchievementParty Member Achievements
Scholar AchievementWeapon and Ability Achievements
Classes AdeptEngineerInfiltratorSentinelSoldierVanguard
Weapons Assault RiflesPistolsShotgunsSniper Rifles
Other PC TweaksMerchants

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