Legend of Underworld is a free MMORPG game with a dark fantasy theme, in which you can explore, battle, and collect resources to expand your territory and build a powerful force. You can play the game alone or with friends in multiplayer mode. You can choose to play in solo mode or in multiplayer mode. In solo mode, you can build your own world, explore, battle, and collect resources to expand your territory. In multiplayer mode, you can join other players around the world to battle, trade, and interact with them. You can also explore the world and find other players to form a union with them. You can challenge the Skeleton King, the Union Boss, and other players around the world to battle and win glory.