Point are the oldest form of rewards in a game , the Point mechanic lets the players know on how the player is doing in game.
A game that is known for a good point system is pong.
What is Pong?
Pong is a table tennis sports game featuring simple two dimensional graphics. Pong was the firts mainstream popularity before any other game,The aim of the game is to defeat an opponent just like table tennis,to win you have to reach a higher score then your opponent
The picture You see below is the arcade game pong. It shows you the point system the vertical platforms that the player moves and the small ball you have to hit to your opponent.Pong isn’t the only game that does a point systems modern games like shooters,rpgs and mmos, the score system could be but in as an XP system for other people to earn points to unlock other items.