Why can't I find Basic Training in matchmaking On halo 3?

[Lachlan~N]

??????????/I want to play it its so easy so how can i ??????????

 

[Taka]

Once you've played/won so many of those games, it just removes the option to join them again. You could create another gamertag just to play those easy games on, but it would encounter the same issue after a few games.