 Like other multiplayer Xbox 360 titles , Halo 3 uses a customized version of TrueSkill ranking system for its matchmaking on a per @-@ playlist basis . A linear measure of a player 's experience with the matchmade portion of the game and each particular playlist is also tracked ( denoted as EXP ) . To help players have an enjoyable time online , several peace @-@ of @-@ mind features are implemented within easy reach , such as avoid / feedback options on a player 's service record , as well as voice chat mute straight from the in @-@ game scoreboard . Like Halo 2 , Halo 3 supports downloadable content and updates . 
