Major League Gaming (or MLG for short) is a professional gaming organization that originated in North America and is headquartered in New York. It was founded in 2002 and holds video gaming tournaments in the USA and Canada; some of which are broadcasted on television.
In Arby 'n' the Chief, MLG players are usually portrayed as highly serious, rude, and sexist towards female players. They usually only play to win and use camping and power weapons as strategies. Master Chief appears to highly respect MLG players at first, evidenced by the way he treated a player named Craig compared to others. However, after Craig and his friends were mean to him, Chief didn't seem to care as much for MLG players.