From the official website:
Heroes of Stalingrad will take the award winning Red Orchestra franchise into the next generation of gaming. Cutting edge graphics and audio built on Unreal Engine 3, inventive features and streamlined realism will deliver an unrivalled WWII experience. Focusing on the Battle of Stalingrad and the surrounding operations, both German and Russian, from July 1942 to February 1943 the game allows the player to experience one of the most brutal battles in all of human history. For the first time ever in a first person shooter gamers will be able to experience WWII from the Axis side in a German single player campaign.
As always with the Red Orchestra franchise, Tripwire will aim to deliver unrivalled accuracy and attention to detail, along with gritty, vicious combat in multi-player, co-op and solo modes. Again, Tripwire have listened to the fans and have designed a whole set of new features to make the game more accessible and easy to get into - all while delivering the tactical shooter realism fans of the original game loved.