Ragnarok Online
Ragnarok Online (
RO) is an
MMORPG created by Gravity Interactive LLC of
South Korea. Much of the background of the game is based on the
graphic novel Ragnarok by Lee Myung-Jin. Currently, there are versions of the game in
Korean,
Japanese,
English (better known as International RO or iRO),
Thai, and
Chinese. Most if not all versions are now pay-to-play and are continually being revised and revamped.