| Description | all races (include extinct) |
| lived 300,000 years before the events of mass effect | |
| A race of blue asexuals. powerful in biotics and can live up to 1000 years (current citadel council race) | |
| an agressive,rude, and stubborn race with 4 eyes | |
| A gentically modified race from 50,000 years ago to current times, they were enslaved by a race of VI machines. | |
| A human sized race that resemble a human and fish lizard | |
| A large lumbering race that always say what emotion they are feeling before starting a conversation | |
| race of synthetic machines with a connected AI network | |
| A race of jellyfish like creatures | |
| you should know this (it's what you are) | |
| Live around 127,000 years before the mass effect game | |
| A mysterious race thought to have been created in order to maintain the citadel | |
| a race of blood thirsty dinosaur-like humanoids. (have the ability to enter a blood rage making them near impossible to kill) | |
| | Description | all races (include extinct) |
| Race that mysteriously disappeared 50,000 years before mass effect | |
| A species with an extremely weak immune system and must wear protective suits. | |
| an intelligent race of insectoids that are currently extinct (unless shepard allowed the last queen to survive) | |
| A true VI. Destroys all advanced races every 50,000 years. | |
| A race of hypermetabolic humanoids. (current citadel race) | |
| lived 127,000 years before the mass effect game | |
| A very large bug like species that is capable of mind control and cloning individuals. | |
| a race of humanoids comparible in size to humans. (current citadel race) | |
| A race of fat little things that resemble a human and a hamster, they wear a respurator in order to breath correctly | |
| Super ugly devil looking things. they're really mean | |
| A race of enormous predatory humanoids (seen in lair of the shadow broker) | |
| Not much is known about this extinct race. they are only mentioned in some planetary surveys. | |
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