Riot Games' MOBA ("Multiplayer Online Battle Arena") is the only game on this list designed to be free-to-play. Pick a powerful and giant champion unit from a vast list of choices and send them off to battle to destroy another team's base. Turrets protect your home while you use your minions and special abilities to fight your way to the enemy.

Leveling up and spending gold gained from destroyed enemy gives this game tons of variety and replay value. Expect some tough matches if your teammates don't work together and go off to do their own thing. Did we mention it's free?

More From GuySpeed