The gameplay follows the traditional Bomberman gameplay. Players must use bombs to blow up and defeat other players. The players must blow up bricks that stand in the way to make way to access other players. Blowing up bricks will give power ups such as increased speed or blast length. The last person standing in each round is the winner. If no players remain, a draw is declared.
Bomberman Live: Battlefest includes up to eight persons online along with teams. It has several new modes and power ups, new arenas, as well as Xbox Live Arcade Avatar support.
Source: Wikipedia, "[en.wikipedia.org/wiki/Bomberman_Live%3A_Battlefest Bomberman Live: Battlefest]", available under the CC-BY-SA License.