Mass Effect Legendary Edition - Factions
The governments, military blocs, corporations and criminal organisations that hold the Mass Effect galaxy together. Council space is run by three Citadel species governments plus the human Systems Alliance, the Terminus Systems answer to nobody, and the trilogy's antagonists range from a human-supre...
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of 15 entries
· updated 2026-09-15
| Name | Type | Description | Region | Points Of Interest |
|---|---|---|---|---|
| Systems Alliance | Human Government / Military | The human supranational government and its military, formed after the discovery of Prothean ruins on Mars. | Earth and human colony space | Admiral Anderson and Captain David Anderson's command SSV Normandy SR-1 and SR-2 crews Arcturus Station Fifth Fleet (Mass Effect 3) |
| Citadel Council | Supranational Authority | The ruling body of asari, salarian and turian councillors that governs Citadel space through the Spectres and the C-Sec. | Citadel space | Council chambers on the Presidium Spectre programme C-Sec (Citadel Security) Councillor Udina and later human councillor |
| Cerberus | Human-Supremacist Organisation | A pro-human black-ops network led by the Illusive Man, built from former Alliance personnel and funded outside Council law. | Cells across the galaxy | The Illusive Man Miranda Lawson and Jacob Taylor Cronos Station Project Lazarus |
| Reapers | Antagonist Machine Race | Ancient machine gods that harvest advanced organic civilisations on a 50,000-year cycle to produce new Reapers. | Dark space, then the whole galaxy | Sovereign (Nazara) Harbinger The Collectors as proxy forces The Citadel as a mass relay trap |
| Geth | Synthetic Collective | A networked synthetic species created by the quarians as labour and driven off Rannoch when it achieved self-awareness. | Perseus Veil | Geth consensus and server hubs Heretic station Legion Rannoch server network (Mass Effect 3) |
| Quarian Migrant Fleet | Nomadic Species Flotilla | The quarian survivors of the geth uprising, living aboard the Migrant Fleet and sending adolescents out on Pilgrimage. | Moving between systems | Admiralty Board (Tali, Raan, Xen, Gerrel, Koris) Rayya and the live ships Pilgrimage tradition Rannoch war fleet (Mass Effect 3) |
| Krogan Clans | Clan-Based Species | The krogan, a species uplifted to fight the Rachni and then neutered by the genophage when their expansion threatened the Council. | Tuchanka and the Krogan DMZ | Urdnot Wrex and Urdnot Grunt Urdnot camp on Tuchanka The Shroud Clan Weyrloc and Clan Gatatog rivals |
| Salarian Union | Species Government | The salarian government, run by dalatrasses and served by the Special Tasks Group. | Sur'Kesh and salarian space | Dalatrass Linron Special Tasks Group (STG) Sur'Kesh STG base Mordin Solus |
| Asari Republics | Species Government | A loose republic of asari city-states governed by consensus and long-lived matriarchs, the oldest spacefaring civilisation in the current cycle. | Thessia and asari space | Thessia and the Temple of Athame Justicars such as Samara Matriarch Benezia Liara T'Soni and the Shadow Broker network |
| Turian Hierarchy | Species Government / Military | A militarised meritocracy where every turian serves in the armed forces, and the backbone of the Council's fleets. | Palaven and turian space | Primarch Adrien Victus Palaven and Menae Garrus Vakarian and C-Sec Turian Sixth Fleet |
| Collectors | Reaper Proxy Force | Insectoid husks of the Protheans, genetically reshaped to serve the Reapers. | Beyond the Omega 4 relay | Collector vessel Collector Base Human-Reaper construction Harbinger's direct control |
| Blue Suns | Mercenary Company | One of the three mercenary companies that dominate Omega's underworld, co-founded by Zaeed Massani before his partner Vido Santiago took it from him. | Omega and the Terminus Systems | Vido Santiago Zaeed Massani Omega recruitment offices Blue Suns base on Korlus |
| Eclipse | Mercenary Company | An asari-led mercenary company with a corporate structure and a sideline in indentured labour. | Illium, Omega and the Terminus Systems | Eclipse headquarters on Illium Eclipse smuggler contracts Noveria and Illium security details |
| Blood Pack | Mercenary Company | A krogan and vorcha mercenary company known for shock troops and varren packs. | Omega and krogan space | Garm and the Blood Pack compound on Omega Varren breeding pits Blood Pack bases on Tuchanka |
| Shadow Broker Network | Intelligence Network | The galaxy's largest private intelligence operation, run by a Broker whose identity is unknown until the Lair of the Shadow Broker add-on. | Unknown, moving | Hagalaz, the Broker's ship Liara's broker office on Illium Ferron and the Broker's agents The Broker's dossiers on the squad |
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