To describe the joy of playing Halo with trusted teammates is a futile one. Some only know of going into Matchmaking as a mercenary, playing with three other strangers. The lack of communication amongst strangers normally equals their defeat. Sometimes their pure Slayer skills pull them through to a victory. Still others round up a few friends and blindly jump in. With no plan and basic communication at best, their fun quickly deteriorates as the defeats pile up. If this is all you know, then describing the feeling of everyone being on the same page, everyone giving you much needed details over the mic, everyone making a plan come together; it will all be foreign to you. But until you have done this, in my opinion, you have never really played Halo at all.