[a.L]

ArchLord
Atlantica Online
CABAL Online
DECO Online
Deicide
Dragonica
DOMO
Ether Saga Online
Eudemons Online
Fiesta
FlyFF
Holic
KAL Online
Last Chaos
Luna Online
Lunia
Mabinogi
Maple Story
Martial Heroes
Neo Steam
Nostale
Perfect World
Ragnarok Online
RAN Online
Rappelz
RF Online
Rohan
ROSE
Scions of Fate
Seal Online
Silkroad
Trickster
Water Margin

Bold - played for a few months or more.
Green - played for less than a week.
Blue - played for a week to a month.
Red - played for a day or less.

There are probably more but I didn't include games that I don't think should fall under RPGs.