Confirmed information it's marked as canon. All governments names are canonical except Krogan's. I also added the ruler title.

HUMAN SYSTEMS ALLIANCE (I add Human because all the other governments have the name of their species):
- Ship prefix: SSV (canon)
- Species name: Human
- Species plural: Humans
- Adjective: Human
- Planet name: Earth (canon)
- Planet class (desert, continental, etc..): Continental (canon)
- System name: Sol (canon)
- Government: Indirect Democracy (canon)
- Ruler title: Prime Minister (Amul Shastri in 2185-2186) (canon)
- FTL method: Hyperspace
- Weapon: Mass Drivers (canon)
- Traits: Talented, Quick Learners, Deviants (were are said to be the most individualist species among all Mass Effect races, so we have more diversity of ideas. An good example of this is Cerberus)
- Graphical culture: Mammalian
- City graphical culture: Mammalian
- Ethics: Fanatic Individualist, Militarist

ASARI REPUBLICS:
- Ship prefix: AML (canon)
- Species name: Asari
- Species plural: Asari
- Adjective: Asari
- Planet name: Thessia (canon)
- Planet class (desert, continental, etc..): Continental
- System name: Parnitha (canon)
- Government: Theocratic Republic (Matriarchs are de facto rulers of the republics, and are like some kind of religious leaders, with acolytes, etc)/Direct Democracy (all Asari can participate in politics thorugh the extranet; they do not have a Parlament or anything similar. I personally prefer this government)
- Ruler title: Matriarch (Tiala, Cerberus Daily News, May 2010) (canon)
- FTL method: Hyperspace
- Weapon: Mass Drivers (canon)
- Traits: Enduring (not Venerable because it doesn't leave room for more traits), Natural Sociologists, Charismatic, Slow Learners, Slow Breaders
- Graphical culture: Avian
- City graphical culture: Avian
- Ethics: Xenophile, Individualist, Spiritualist/Materialist

TURIAN HIERARCHY:
- Ship prefix: PFS (canon)
- Species name: Turian
- Species plural: Turians
- Adjective: Turian
- Planet name: Palaven (canon)
- Planet class (desert, continental, etc..): Continental/Savannah (Palaven receives a lot of radiation, which makes it a hot planet, but not desertic)
- System name: Trebia (canon)
- Government: Military Junta
- Ruler title: Primarch (Fedorian before 2186, Adrien Victus after 2186) (canon)
- FTL method: Hyperspace
- Weapon: Mass Drivers (canon)
- Traits: Industrious, Strong, Resilient, Nonadaptative
- Graphical culture: Mammalian
- City graphical culture: Reptilian
- Ethics: Collectivist, Fanatic Militarist

SALARIAN UNION:
- Ship prefix: SUR
- Species name: Salarian
- Species plural: Salarians
- Adjective: Salarian
- Planet name: Sur'Kesh (canon)
- Planet class (desert, continental, etc..): Tropical (canon)
- System name: Pranas (canon)
- Government: Science Directorate
- Ruler title: Dalatrass (Linron in 2186) (canon)
- FTL method: Hyperspace
- Weapon: Mass Drivers (canon)
- Traits: Intelligent, Natural Physicists/Quick Learners, Rapid Breeders, Weak, Fleeting
- Graphical culture: Arthropoid
- City graphical culture: Fungoid
- Ethics: Collectivist, Fanatic Materialist

BATARIAN HEGEMONY:
- Ship prefix: BCS
- Species name: Batarian
- Species plural: Batarians
- Adjective: Batarian
- Planet name: Khar'shan (canon)
- Planet class (desert, continental, etc..): Continental
- System name: Harsa (canon)
- Government: Despotic Empire (the Hegemony is an autoritation/totalitaristic government that even have an orwellian Ministry of Information)
- Ruler title: Great Leader (you know, very North Korea hahaha)
- FTL method: Hyperspace
- Weapon: Mass Drivers (canon)
- Traits: Thrifty, Conformists, Decadent, Solitary
- Graphical culture: Mammalian
- City graphical culture: Mammalian
- Ethics: Fanatic Xenophobe, Collectivist

KROGAN COMMONWEALTH (not a canonical name. I prefer to reserved the word "Clans" for the Vorcha empire name):
- Ship prefix: KKT
- Species name: Krogan
- Species plural: Krogan
- Adjective: Krogan
- Planet name: Tuchanka (canon)
- Planet class (desert, continental, etc..): Desert/Tomb (Tuchanka was originally a tropical world, but was destroyed when the Krogan went to nuclear war) (canon)
- System name: Aralakh (canon)
- Government: Military Dictatorship
- Ruler title: Overlord (Urdnot Wrex in 2185-2186) (canon)
- FTL method: Hyperspace
- Weapon: Mass Drivers (canon)
- Traits: Very Strong, Adaptive, Sedentary, Slow Breeders, Slow Learners (Krogan also have a lifespan even greater that the Asari, but most of them don't survive so long, so I have prefered not to add it because if so there wouldn't be room for Very Strong trait)
- Graphical culture: Reptilian
- City graphical culture: Reptilian
- Ethics: Individualist/Xenophobe/Collectivist (either of them fits well with Krogan), Fanatic Militarist

GETH CONSENSUS:
- Ship prefix: Platform/Geth/Unit (even ships are geth runtimes)
- Species name: Geth
- Species plural: Geth
- Adjective: Geth
- Planet name: Rannoch (canon)
- Planet class (desert, continental, etc..): Arid (canon, but geth should be able to colonize every planet class)
- System name: Tikkun (canon)
- Government: Despotic Hegemony
- Ruler title: Platform/Geth/Unit
- FTL method: Hyperspace
- Weapon: Mass Drivers (canon)
- Traits: Intelligent, Natural Engineers, Communal, Slow Breeders, Sedentary
- Graphical culture: Fungoid
- City graphical culture: Mammalian
- Ethics: Fantic Collectivist, Materialist

CERBERUS (I don't really like Cerberus as an empire. They're just an outlaw organization):
- Ship prefix: none
- Species name: Human
- Species plural: Humans
- Adjective: Cerberus
- Planet name: Cronos (Cronos Station is the closest thing Cerberus has a planet for its own)
- Planet class (desert, continental, etc..): Continental/Ring
- System name: Anadius
- Government: Despotic Empire
- Ruler title: none title (Illusive Man) (canon)
- FTL method: Hyperspace
- Weapon: Mass Drivers (canon)
- Traits: Intelligent, Quick Learners, Natural Engineers, Solitary, Repugnant
- Graphical culture: Mammalian
- City graphical culture: Mammalian
- Ethics: Xenophobe, Militarist, Materialist

QUARIAN MIGRANT FLEET (is not really a good name for Quarians on a planet, though I think they should be ingame as Nomads, not an Empire)
- Ship prefix: none (in the Flotilla the ships doesn't have prefix)
- Species name: Quarian
- Species plural: Quarians
- Adjective: Quarian
- Planet name: invented
- Planet class (desert, continental, etc..): Arid
- System name: invented
- Government: Indirect Democracy (the Conclave, a kind of Parliament formed by a representative of each ship of the Flotilla elected democratically, rules the day-to-day; the Admiralty Board only deals with military matters)
- Ruler title: Representative/Councilor
- FTL method: Hyperspace
- Weapon: Mass Drivers (canon)
- Traits: Communal, Natural Engineers, Nomadic, Nonadaptive, Sedentary
- Graphical culture: Molluscoid
- City graphical culture: Reptilian
- Ethics: Fanatic Materialist, Individualist

COLLECTORS (should be an Enclave, Guardian or Fallen Empire):
- Ship prefix: none
- Species name: Collector
- Species plural: Collectors
- Adjective: Collector
- Planet name: Collector Base
- Planet class (desert, continental, etc..): doesn't matter (if possible, it should be Ring/AI to represent their station in the Galactic Core)
- System name: Tartarus (canon name of the Black Hole system in the Galactic Core)
- Government: Despotic Hegemony
- Ruler title: Harbinger/Collector General
- FTL method: Hyperspace
- Weapon: Mass Drivers (canon)
- Traits: Strong, Industrious, Natural Sociologists, Repugnant, Decadent
- Graphical culture: Arthropoid
- City graphical culture: Arthropoid
- Ethics: Xenophobe, Materialist, Militarist

I'm not very pleased with the traits of Quarians and Collectors, but those are the best options for me.

CERBERUS:
-no ship prefix
- species name/plural: Human/Humans
-Adjective Cerberus
-Planet: Cronos
-Star Anadius
-Government: Military dictatorship. Cerberus focuses a lot on military, and this combines that with an autocracy.
-Ruler title: for this one, just put a space, ex. " ". This way, the name of the ruler will show up with no title.
-FTL Method: warp. Warp should be used for all because when not using mass relays, ships fly trhough clusters by shrinking their mass in efectively a bubble, similar to warp.
-Weapon: Mass Drivers.
-traits: enduring(in canon, humans usually live 150 yrs due to irradication of disease), Natural sociologists(they do alot of biotic and biological experiments), talented, and finally repugnant(cerberus is widely disliked)
-graphical culture: mammilian ships
-cityscape: mammilian cities
-Ethics: xenophobe(higher place for humans no matter the costs to other aliens), materialist(often known for their strange experiments), militarist(obvious choice).

Originally posted by Alexthe666:

CERBERUS:
-no ship prefix
- species name/plural: Human/Humans
-Adjective Cerberus
-Planet: Cronos
-Star Anadius
-Government: Military dictatorship. Cerberus focuses a lot on military, and this combines that with an autocracy.
-Ruler title: for this one, just put a space, ex. " ". This way, the name of the ruler will show up with no title.
-FTL Method: warp. Warp should be used for all because when not using mass relays, ships fly trhough clusters by shrinking their mass in efectively a bubble, similar to warp.
-Weapon: Mass Drivers.
-traits: enduring(in canon, humans usually live 150 yrs due to irradication of disease), Natural sociologists(they do alot of biotic and biological experiments), talented, and finally repugnant(cerberus is widely disliked)
-graphical culture: mammilian ships
-cityscape: mammilian cities
-Ethics: xenophobe(higher place for humans no matter the costs to other aliens), materialist(often known for their strange experiments), militarist(obvious choice).

I prefer Despotic Empire because Cerberus leadership is always talking about "salvation demands sacrifices" and that kind of crap. In Mass Effect 3 they are mainly a military organisation because of the Reaper War, but before that the military branch of the organization was very small, as it is shown in ME 1, ME 2 and the novels.

Also, Batarians, Turians, Quarians and probably Volus and Elcor all lives about 150 years. It's the standard lifespan in Mass Effect. And biotics it's more like Physicians.

HUMAN SYSTEMS ALLIANCE (I add Human because all the other governments have the name of their species)

Nitpick, but that's not quite true. The Courts of Dekuuna (elcor) and the Illuminated Primacy (hanar) also lack species names. IMHO, I would keep it simply as the Systems Alliance, since that's the canonical name.

I'd argue that the Turian Hierarchy would be better represented as a Military Republic as that better represents the meritocracy of the Hierarchy. I'd also say that the Salarians would be better suited as a Scientific Directorate. Finally I would say that the Systems Alliance are Militarists and Fanatic Individualists and scrap the Materialist trait.

Originally posted by Phoenix:

HUMAN SYSTEMS ALLIANCE (I add Human because all the other governments have the name of their species)

Nitpick, but that's not quite true. The Courts of Dekuuna (elcor) and the Illuminated Primacy (hanar) also lack species names. IMHO, I would keep it simply as the Systems Alliance, since that's the canonical name.

True. But I would call those governments: "Elcor Courts of Dekuuna" and "Hanar Illuminated Primacy". That way, they sound better to me. Every time I hearded someone in the games saying "the Alliance" alone, but on the other hand mentioning "the Turian Hierarchy", "the Batarian Hegemony", "the Salarians Union", "the Vol Protectorate", etc... instead of simply "the Hierarchy", "the Hegemony", "The Union", "the Protectorate"... they always sound to me like human-centrism. And there is a great deal of ♥♥♥♥♥♥♥ human-centrism in Mass Effect.

Actually, in all the ocassions in ME3 the Hanar government is named, it has "Hanar" add to "Illuminated Primacy".

Originally posted by LostInACave:

I'd argue that the Turian Hierarchy would be better represented as a Military Republic as that better represents the meritocracy of the Hierarchy. I'd also say that the Salarians would be better suited as a Scientific Directorate. Finally I would say that the Systems Alliance are Militarists and Fanatic Individualists and scrap the Materialist trait.

About the Salarians, I couldn't decided between the Despotic Hegemony and the Science Directorate. I have choosen the first because they're ruled by a feudal government system and because officially science has nothing to do with the Union. Also, Despotic Hegemony allows a quicklier development of technologies.

As for the Turians, I have choose Military Dictatorship because in the other 2 the ruler is voted, but the Turians don't do that. They choose someone to rule for his merits.

About Humans, I just have followed the vanilla game, except eliminate the Nomadic trait (I think only the Quarians should have that trait).

But of course, this is all just my opinion.

I think that the Turians would have a Military Junta, cause in the government section in the wiki, it says, "At the top are the Primarchs, who each rule a colonization cluster. The Primarchs vote on matters of national importance." http://masseffect.wikia.com/wiki/Turian_Hierarchy#Government

If anything, the Collectors should be a Leviathan or something like an Enclave *nod*

Originally posted by ApSciLiara:

If anything, the Collectors should be a Leviathan or something like an Enclave *nod*

Or a Fallen Empire. But no playable. Like Cerberus (shouldn't be represented as an Empire) and Quarians (should be Nomads).

Originally posted by dellasc:

I think that the Turians would have a Military Junta, cause in the government section in the wiki, it says, "At the top are the Primarchs, who each rule a colonization cluster. The Primarchs vote on matters of national importance." http://masseffect.wikia.com/wiki/Turian_Hierarchy#Government

Yes, I'm a bit confused about that. On one hand we are said that each cluster has its own Primarch, and that the Hierarchy is ruled by all of them together. On the other hand, in ME3 the Primarch of Palaven appears to be more important than the other Primarchs (which makes sense for me) and the head of state of the Hierarchy. I don't know what suits better for the Turian government.

Geth can't be a Science Directorate if they're Fanatic Collectivist (that ethos allows autocracies only), so maybe Collectivist and Xenophobe to show that they are isolationists?

Originally posted by Makesin:

Geth can't be a Science Directorate if they're Fanatic Collectivist (that ethos allows autocracies only), so maybe Collectivist and Xenophobe to show that they are isolationists?

True. I have changed their government to Despotic Hegemony, though the correct form of government for Geth is Moral Democracy (which is impossible to choose because of the Ethics). Also, I have put Science Directorate for Salarians as LostInACave said. Thinking about it, I realized that an oligarchy government is probably better for Salarians, since only the females (10% of the population) are in charge of politics.

Yes, I'm a bit confused about that. On one hand we are said that each cluster has its own Primarch, and that the Hierarchy is ruled by all of them together. On the other hand, in ME3 the Primarch of Palaven appears to be more important than the other Primarchs (which makes sense for me) and the head of state of the Hierarchy. I don't know what suits better for the Turian government. [/quote]

I still think that the Hierarchy would still be a Military Junta, since to me it just seems like the Primarch of Palaven is the head of a council, with other Primarchs still having a say, which kind of be like the player (Stellaris) playing as the Palaven Primarch, and the other Primarchs coming in to vote on who succeeds you after the 50 years of power.

Originally posted by dellasc:

Yes, I'm a bit confused about that. On one hand we are said that each cluster has its own Primarch, and that the Hierarchy is ruled by all of them together. On the other hand, in ME3 the Primarch of Palaven appears to be more important than the other Primarchs (which makes sense for me) and the head of state of the Hierarchy. I don't know what suits better for the Turian government.

I still think that the Hierarchy would still be a Military Junta, since to me it just seems like the Primarch of Palaven is the head of a council, with other Primarchs still having a say, which kind of be like the player (Stellaris) playing as the Palaven Primarch, and the other Primarchs coming in to vote on who succeeds you after the 50 years of power.

Right. Is better represented as a Military Junta.

Can they be a fan-fiction realted to ME universe or just original ones ?

Quarians should be definitely nomads. I agree with Collectors beeing an enclave or FE as well. Cerberus shouldn´t be a playable faction too.