There are those userbars whose requirement is not mentioned clearly. so.. how to get them? The list of those userbars are.
Creed Infamous
Creed Anonymous
Creed Shakespeare
Creed Artist
Creed's Lil Helper
Creed Bugcatcher

Creed shakespere is for the one who are skilled in roleplaying. Just roleplay for sometime and you can unlock it!

Creed Lil helper is a userbar which is given to a few players who helped Da Man to improve the game. (just saw a old thread with giving away that userbar. Mostly catcherpro and campt got em)

creed bug catcher is the one which can be unlocked only if u reported a lot of bugs. Brys told me a long time ago that u have to pm Da Man to make that userbar unlockable if u have the requirement. Thats all i know

Creed Infamous - I heard that very few can unlock those. I'm not 100% sure on how, though.
Creed Anonymous - I heard that only members of Da Man's family can unlock this one.
Creed Shakespeare - Only people that make high-quality roleplays (good Grammar, good plotline, etc) can get this one.
Creed Artist - I heard that only really good spriters can get this one.
Creed's Lil Helper - Only unlockable by those who have helped Da Man improve the game.
Creed Bugcatcher - Only unlockable by people who have reported a lot of bugs that hurt the game.

Oh, thank you eb and shinxey for telling me. You have enlightened me xD.

Actually, I think Creed Shakespeare is only awarded once you get around 1,000 roleplay posts; that's how I remember getting mine, at least.