Slitherine announces the release of Order of Battle: Winter War, a paid expansion for free-to-play World War II wargame Order of Battle. The Windows and OS X expansion can be found on Steam, and it updates the game with a completely new set of Finnish units and a new campaign with 13 new scenarios. This product section has details and images, and here's word:

After going Free-to-Play and having been download over 500k times in a month, Order of Battle changes theatre of war for the first time, leaving the beaches of Pacific islands and landing in Europe. This paves the way for a completely new set of units, including Finnish ski troops, panzerfaust-equipped infantry, German Panzer IV and StuG III combat vehicles, several variations of the Soviet T-34, KV-2 152mm-armed heavy tanks and a whole range of iconic aircraft such as the Me Bf-109, Fw-190, Yak-7, Il-2 Sturmovik and Fokker D.XXI.