In Medieval Battles Online, players must command thousands of soldiers in intense real-time PvP battles. This is a pure skill arena where strategy reigns rather than in-game purchases. Money spent in this game is only used to buy better-looking outfits. The factor that decides victory or defeat is how you arrange your formation.

The ranking system has 10 fierce tiers from Rookie to Legend, testing your ability to command troops. The more victories you achieve, the higher you rise. However, climbing to a truly high position is very difficult. Players must strive to make their armies stronger. In addition, players must understand the roles of different unit types in order to arrange them effectively.