APB: Reloaded, which will be released in the next few weeks. The DLC will include a new gameplay mode called "Fight Club", as well as two brand new maps.
The MMO publisher has not revealed yet what the new mode involves, but according to CinemaBlend, "...word is on the forums is that it’s a focused deathmatch mode of sorts, throwing players in a seedy situation to duke it out against other players. The full rules of the mode still aren’t clear but it appears Fight Club is being aimed at clan competitions and tournaments, with 12 vs 12 and 20 vs 20 bouts being made available."
The new game mode will be tested starting on the 21st November, but exclusively for premium members. GamersFirst states additional challenges, missions and details included within the Fight Club mode will be revealed in the near future.