TripleA - TripleA is a free (under GPL) turn based strategy game based on Axis & Allies board game.
Black Desert Online - This Korean developed MMORPG offers a dynamic, action-based combat system in a richly developed fantasy setting.
Domination - Domination is a game that is a bit like the well known board game of Risk.
Ragnarok Online - Ragnarok Online is a Fantasy-based and MMORPG video game developed and published by Gravity Co.
ThumbZilla - Awesome thumb stomping and kicking action game.
FlyFF - Flyff (Fly For Fun) is one of the greatest running fantasy based MMOs.