In MMO, the most famous games are League of Legend and FIFA.
In League of Legend the goal of the game is to destroy the ennemy base and kill the other players. In FIFA you play versus an other football team and the rules of the game are the same than IRL (In real life).
The only tactical game in Esport is Starcraft. In this game, your goal is to defend your base and create an army to destroy ennemies. This game is one versus one. All these games need an internet connection to play in Esport. During competitions, you can win big prices with money.