Crimson Alliance is a co-op action role-playing game developed by Certain Affinity and published by Microsoft Studios. The game was first announced in May 2011 at a Rooster Teeth event and was available for demo at E3, ComicCon and PAX Prime, with the press release being announced on May 31, 2011.
Crimson Alliance was released on September 7, 2011 on Xbox LIVE Arcade for free as a freemium. Player can choose to pay between 800 Microsoft Points for one character class or 1200 Microsoft Points for all three character classes. The game was also offered as a free bonus code download for those who purchased all five of the fourth annual Xbox Live Summer of Arcade titles before August 23, 2011.
Source: Wikipedia, "Crimson Alliance", available under the CC-BY-SA License.