Guns and health: Google is your friend
Matchmaking like in CS: 1. You need a lot of players to make the system work. 2. That´s a very, very, very, very, very complex system. It´s not just about Elopoints, it´s also about K/D W/L, maybe even time and a lot more stuff. Forget it and make a simple Server browser or something like that or connect to a random session.