I've been playing Classic Ragnarok, from Gravity warpportal, for the past week. It's a MMORPG, but since it's a new server that opened about 2 weeks ago, everyone is at the start! It's a 10 year old PC game, meaning even my older pc from 2002 can still run it!
They've got a huge community in there, but levelling is a very slow process!
They have some info on the game in their facebook:
www.facebook.com/playragnarok