Natural Selection 2 is one of my favorite game. I play it often, almost every day via steam.
It is a team-based game, marines versus alien with a lot of coordination and strategy required. It has a elo system implemented to help balance the teams before each game.
After being stuck around 1500 point for a long time but after about 1 month of work, I finally broke the 2000 point mark!
Now let’s pass 3000 points !