16-player Xbox Live Arcade Game UnveiledUndertow is the title of a newly revealed Xbox Live Arcade game in development at Chair Entertainment thats set underwater and features plenty of shoot-em-up action. Its raised a few eyebrows due to its two multiplayer modes supporting up to 16 players. This is accompanied by a 15-level single-player campaign that can be played solo or in co-op. "While many of the maps have level-specific goals, the core gameplay of Undertow centers on this maxim: Kill as many enemies as you can - and stay alive for as long as possible!", Chair Entertainment has explained. Its added, "Players select their race (Iron Marine, Nemoidian, or Atlantian) and unit type and are then launched into battle. Each of the three races features four unique, upgradeable unit types ranging in ability from the fast and agile to the large and powerful. Players have the ability to unlock and purchase unit upgrades as they acquire points. Each unit type has three levels of permanent upgrades. "Through conquest-style battles, players obtain points by killing enemies, accomplishing team goals, and taking check points. Points and a variety of power-ups can be used to further upgrade unit abilities." Chair Entertainment expects to get the game on to Xbox Live Arcade this summer.