What MMORPG doesn't have a guild. But having a War of
Emperium (I know, taken from RO) is so much fun. Guilds
must compete to earn castles. Then at war of emperium,
other guilds can take it from you, and you must defend.
I know we don't have many players now, so we could
start off with only one castle, and all guilds will
have to go after that. But after many players join, we
can have many castles, and have guilds competing and
defending all of them!
Depends on guilds being implemented