Via XBLArcade, news of an IGN preview revealing Xbox Live Arcade title Undertow from Chair Entertainment, and it's a 2D underwater multiplayer shooter from the creators of Advent Rising. Blimey.

According to IGN, the gameplay of the title" ...is best described as Geometry Wars meets Battlefield. Movement is mapped to one analog stick with attack on the other. Shots come in a constant stream a la Geometry Wars and depth charges can be activated with the pull of a trigger... The goal is to destroy your enemies and take control of their bases, with victory coming from a similar system to the flag and ticket system Battlefield is famous for."

A glance at Chair Entertainment's website reveals that their other projects include work with Orson Scott Card on Empire, "...a chilling look at a near future scenario of a new American Civil War. Chair is now simultaneously developing a feature film, and a future comic book series and video game all inspired by that same universe."

(Some may recall that the Mustard brothers worked on Advent Rising with Scott Card, hence the continuing connection. In the meantime, good to see an underwater 2D shooter for XBLA - continuing the proud tradition of In The Hunt by other means!)