Brad Muir, project lead for Iron Brigade at Double Fine Productions, sent out a Tweet earlier today that the cost for Iron Brigade‘s newest DLC “Rise of the Martian Bear” has “been CONFIRMED for 400 Microsoft Points!”.  That  will get you four new maps (two that can be played in survival mode), one new boss fight, an expanded and enhanced arsenal, and additional customization options.

Joystiq reports there will be a title update as well which will allow cross functionality between players who have and players who do not have the DLC. “Rise of the Martian Bear” will launch on February 1st.

Source: Joystiq and @MrMooEar