Hello friends, I’ve never really been to into the custom games scene in Halo until recently a couple friends and I decided to give them a go. However, none of us know too much about what the best games are(particularly for only 3 people to play), or how the customs browser works, such as can we go into the C browser as a party? So if any and all could kindly give me some suggestions/explanations it would be much appreciated! 
It’s pretty strait forward just mess around with it. Basics though is
Press Y to filter a search
There will be a number of players in the game already
And you can’t go as a party you’ll have to invite your friends once you are in the lobby