Hello Spartan i am hosting a Halo 3 Annual Achievement looby which i need 3 more player to get it started. The Halo MCC game is the one i am playing on for xbox one. If go well for all 4 player with good internet and no lag we can do this no problem. 
The time to start this when all 4 spartan can do this on time that we all can agree on.
Just send me message on my xbox live account which same name as my user name which is John Leonidas or just send me a message on halowaypoint thread here down below here.
Have a nice day Spartan.