CastleStorm, Zen Studios' physics-based tower defense title, was released on Steam today, and downloadable content is headed to the game this week, according to the developer.
On July 31, CastleStorm will receive the first of two expansions, From Outcast to Savior, both on Steam and Xbox Live Arcade. The $2.99 (240 Microsoft Points) DLC will include the new Royal Guard faction, as well as new environments, weapons, 20 battles and new Achievements.
Check out the video above to see From Outcast to Savior in action and the gallery below to see it in still form. For more on the game, be sure to check out Polygon's CastleStorm review.