Legend Online is a free to play RPG game released in 2013.
In this game you chose from 3 typical RPG classes: the mage, the archer and the warrior. Each of these has their unique skillsets, advantages and disadvantages. You also have a building called the Town Hall, which must be upgraded, because all other buildings and upgrades, such as the smith, the mine and so depend on it. You get different equipments from the adventures and dungeons you go inside. There are many different options and possibilities in this game gear-wise, so it can be a bit overwhelming at first for new players.
Battles are turn-based, and are played in front of on pseudo-3D backgrounds. They can be controlled manually or you can let the game take control of the battle.
The game can be played either alone or in groups. Group dungeons are harder, but they give more and better items. There is also PvP, in which players battle each other in arenas and earn points for arena gear, and some world bosses which must be fought in larger groups.