Codex Entry Guide

Codex entries are worth getting, if maximizing experience and advancement is the goal. The following is a list of every known codex entry in Mass Effect, along with locations they are found. Some entries may be attainable in multiple ways.

Secondary
{| border=1 cellspacing=0 cellpadding=1 ! Entry ! Location
 * colspan=2 | Player Tutorials
 * 01: Basic Controls
 * rowspan=13 | Available at 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
 * colspan=2 | Personal History Summary
 * Profile
 * Available at beginning.
 * colspan=2 | Aliens: Council Races
 * Asari: Culture
 * Asari: Government
 * Asari: Military Doctrine
 * Asari: Religion
 * Salarians: Biology
 * Salarians: Government
 * Salarians: League of One
 * Salarians: Military Doctrine
 * Salarians: Special Tasks Group
 * Turians: Biology
 * Turians: Culture
 * Turians: Government
 * Turians: Military Doctrine
 * Turians: Religion
 * Turians: The Unification War
 * colspan=2 | Aliens: Extinct Races
 * Protheans: Beacon
 * Protheans: Cipher
 * Protheans: Data Disks
 * colspan=2 | Aliens: Non-Council Races
 * Geth: Armatures
 * Geth: Hoppers
 * Krogan: Biology
 * Krogan: Culture
 * Krogan: Genophage
 * Krogan: Krogan Rebellions
 * Quarians: Economy
 * Quarians: Government
 * Quarians: Migrant Fleet
 * Quarians: Pilgrimage
 * colspan=2 | Citadel and Galactic Government
 * Citadel Conventions
 * Citadel Station: Citadel Security Services (C-Sec)
 * Citadel Station: Presidium Ring
 * Citadel Station: Serpent Nebula
 * Citadel Station: Statistics
 * Finish the cutscene concluding Eden Prime.
 * Citadel Station: Wards
 * Treaty of Farixen
 * colspan=2 | Humanity and the Systems Alliance
 * Genetic Engineering
 * Human Diplomatic Relations
 * Systems Alliance: Geological Survey
 * Systems Alliance: Military Doctrine
 * Systems Alliance: Military Jargon
 * Systems Alliance: Military Ranks
 * Systems Alliance: N7
 * Terra Firma Party
 * Timeline
 * Available at beginning.
 * colspan=2 | Planets and Locations
 * Stations: Arcturus Station
 * Stations: Gagarin Station
 * colspan=2 | Ships and Vehicles
 * FTL Drive: Appearance
 * FTL Drive: Drive Charge
 * Space Combat: Combat Endurance
 * Space Combat: General Tactics
 * Starships: Crew Considerations
 * Starships: Cruisers
 * Starships: Dreadnought
 * Starships: Fighters
 * Starships: Frigates
 * Starships: Heat Management
 * Starships: Sensors
 * Ask Navigator Pressly about the Normandy's stealth systems.
 * Vehicles: Combat Drones
 * Weapons: Disruptor Torpedoes
 * Weapons: GARDIAN
 * colspan=2 | Technology
 * Biotics: Biotic Amps
 * Ask Doctor Chakwas about Kaiden, then L2s.
 * Biotics: Life as a Biotic
 * Biotics: Training
 * Communications
 * Communications: Administration
 * Communications: Methodology
 * Credits ("Creds")
 * colspan=2 | Weapons, Armor and Equipment
 * Upgrades
 * Collect any upgrade from the field.
 * Citadel Station: Citadel Security Services (C-Sec)
 * Citadel Station: Presidium Ring
 * Citadel Station: Serpent Nebula
 * Citadel Station: Statistics
 * Finish the cutscene concluding Eden Prime.
 * Citadel Station: Wards
 * Treaty of Farixen
 * colspan=2 | Humanity and the Systems Alliance
 * Genetic Engineering
 * Human Diplomatic Relations
 * Systems Alliance: Geological Survey
 * Systems Alliance: Military Doctrine
 * Systems Alliance: Military Jargon
 * Systems Alliance: Military Ranks
 * Systems Alliance: N7
 * Terra Firma Party
 * Timeline
 * Available at beginning.
 * colspan=2 | Planets and Locations
 * Stations: Arcturus Station
 * Stations: Gagarin Station
 * colspan=2 | Ships and Vehicles
 * FTL Drive: Appearance
 * FTL Drive: Drive Charge
 * Space Combat: Combat Endurance
 * Space Combat: General Tactics
 * Starships: Crew Considerations
 * Starships: Cruisers
 * Starships: Dreadnought
 * Starships: Fighters
 * Starships: Frigates
 * Starships: Heat Management
 * Starships: Sensors
 * Ask Navigator Pressly about the Normandy's stealth systems.
 * Vehicles: Combat Drones
 * Weapons: Disruptor Torpedoes
 * Weapons: GARDIAN
 * colspan=2 | Technology
 * Biotics: Biotic Amps
 * Ask Doctor Chakwas about Kaiden, then L2s.
 * Biotics: Life as a Biotic
 * Biotics: Training
 * Communications
 * Communications: Administration
 * Communications: Methodology
 * Credits ("Creds")
 * colspan=2 | Weapons, Armor and Equipment
 * Upgrades
 * Collect any upgrade from the field.
 * Space Combat: General Tactics
 * Starships: Crew Considerations
 * Starships: Cruisers
 * Starships: Dreadnought
 * Starships: Fighters
 * Starships: Frigates
 * Starships: Heat Management
 * Starships: Sensors
 * Ask Navigator Pressly about the Normandy's stealth systems.
 * Vehicles: Combat Drones
 * Weapons: Disruptor Torpedoes
 * Weapons: GARDIAN
 * colspan=2 | Technology
 * Biotics: Biotic Amps
 * Ask Doctor Chakwas about Kaiden, then L2s.
 * Biotics: Life as a Biotic
 * Biotics: Training
 * Communications
 * Communications: Administration
 * Communications: Methodology
 * Credits ("Creds")
 * colspan=2 | Weapons, Armor and Equipment
 * Upgrades
 * Collect any upgrade from the field.
 * Biotics: Biotic Amps
 * Ask Doctor Chakwas about Kaiden, then L2s.
 * Biotics: Life as a Biotic
 * Biotics: Training
 * Communications
 * Communications: Administration
 * Communications: Methodology
 * Credits ("Creds")
 * colspan=2 | Weapons, Armor and Equipment
 * Upgrades
 * Collect any upgrade from the field.
 * Communications: Methodology
 * Credits ("Creds")
 * colspan=2 | Weapons, Armor and Equipment
 * Upgrades
 * Collect any upgrade from the field.
 * colspan=2 | Weapons, Armor and Equipment
 * Upgrades
 * Collect any upgrade from the field.
 * Collect any upgrade from the field.