Multiplayer Online Battle Arena (MOBA) games combine real-time strategy, role-playing, and action genres. These games involve two teams competing against each other on a pre-defined battlefield where each player controls one character with its own set of special abilities that strengthen throughout the game. The ultimate goal is to destroy the opponents' main base, usually located at the opposite end of the map. Assistance comes from computer-controlled units that periodically spawn and march toward their enemy's base while providing protection from defensive structures. MOBA games originated as a subgenre of real-time strategy and have since evolved into their own entity.