Looking for help with programming new rules in existing games

Hello community,

I am looking for someone who knows a little about running your own video game servers and being able to change the rules of the actual game or add certain things. I am honestly looking for information about this subject, but I am looking for a partner on this project. The team I am working with now has pretty much gone as far as we can go and some outside help would be awesome.

An example of this would be hosting private playlists of Call of Duty and having our website track certain metrics in the game like kills, damage etc. People would be able to start a game on the site and it would open up right to the lobby on the pc or console.

Any kind of help would be appreciated, even some sort of direction on where to look.

Thank you!