The second season of Marathon is only a few weeks old, but Bungie is already providing players with the early word about next month’s mid-season update. One of the changes coming to the game is Vault Breaker, a new experimental PvE mode. As shared on Bungie’s official site, Vault Breaker will let players explore the endgame Cryo Archive map and plunder its many “vaults” as either a crew, a duo, or solo, without the threat of running into other players.…