Insanely Twisted Shadow Planet DLC scheduled for Sept. 13 [update: DLC is MIA]

The latest Xbox Live release schedule portends a return voyage to Insanely Twisted Shadow Planet. The stylish, free-floating exploration game is set to receive a new add-on, called "Insanely Twisted Shadow Planet: Shadow Hunters," on September 13.

According to comments made earlier by Fuelcell games CEO Joe Olson, the DLC introduces a "co-op experience," presumably boosting the number of simultaneous flying saucers in a single household to impending-divorce levels.

Fuelcell has confirmed neither the release date (which is subject to change), nor the listed price of 400 MS Points ($5). We'll let you know as soon as we hear more about the actual "C" in this DLC.

Update: The DLC missed Microsoft's proposed release date, and Fuelcell has not responded to our requests for comment.

This article was originally published on Joystiq.