i know of the Dark Brotherhood, Fighters Guild, Thieves Guild, Mages Guild, Arena Combantant. Are there any other guilds you can join?

There is a Vampire Hunters guild too.

really, how do you join them?

is there a guild for vampires?

There is a vampire in the Dark Brotherhood. Does that count?

A vampire? That Vicente Valtieri guy right? I saw him but I don't think he counts as a vampire guild. There are only 5 guilds in this game, 6 if you count in the Blades. These guilds are the Mages Guild, Thieves Guild, Fighters Guild, Dark Brotherhood and the Arena of course. A poor selection if you ask me.

Maybe but you've got to remember how in depth the guilds and its missions are they each have very good storylines well the ones ive been in, fighters, DB, blades the only one that deosnt is the arena but its amazingly fun

Currently I'm in: The fighters guild, the mages guild, the arena guild, the order of the sacred blood, the knights of the white stallion, and the blades. I'm sure there are no doubt more, but I just havn't signed up to them yet.

That said, I havn't signed up to the Dark Brotherhood or Thieves guild yet really, as I'm playing a good guy. Just wait until I play it through as an uber-villain...
And of course the only ones that are any big deal at all are the Fighters, Mages, Theives, Dark Brotherhood and Arena. The others are just smallish little subguilds.

Foster, tell me about teh knights of the white stallion, order of sacred blood, and blades please. id like to know more. also can you tell me how to join them?

Foster is offline right now,but i can answer you.

To join the Knights of the White Stalion travel to Leyawiin and triger ''Mazoga the Knight'' quest.You can find Mazoga in the city castle.Then talk to the count.Fallow the quest and you will become a knight( i don't want to spoil any more)

To join The order of Virtous Blood,you will need some fame.then a Dunmer woman should aproach you in the Temple district (Imperial City) and invite you to Isidur's house.Accept,and follow the quest (That's enough for spoilers).

And Blades......wait,aren't you a Blade by fallowing the main quest?

umm, i dont think so. if you are in the blades it should show up on the guilds menu. and im not in it. If anybody knows how to join them please inform me. also if you know of any other guilds not mentioned yet, please inform me of that too.

oh yes, thanks hypno for the info. its going to be hard getting fame, cuz im a bad guy. i have a lot of infamy though

I'm also a bad guy (Dark Brotherhood,Thievs Guild),and i also have infamy.The easyest way to get fame is to fight in the Arena.Or do quests for important people.

HyPNO's right - White Stallion through the Mazoga quest, Virtuous Blood through fame and an approach in the Temple district leading to a quest, Blades through main quest.

Actually, having finished the main quest last night (I'm going to start an evil character now because being level 24 and good isn't half as fun as the chance to kill lots of people), I can tell you that you become a member of two select clubs on completion of the main quest.

SPOILER!

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The blades you get from Jauffre at Cloud Ruler Temple after arrival there with him and Martin. He asks if you want to be a Blade, and you say 'yes'. Easy peasy. They've got some okay armour and weapons, and lots of Samurai swords.

After the final main quest mission, you're awarded a few (well, two) things, one of which happens to be a title, which makes you a member of an order. I won't say any more than that, lest I spoil it completly.

By the way, love the ending.