Lou Coatney offers Stalingrad Attacked, a free, complete board wargame. Coatney is a veteran game designer with a number of published designs, including Dark Crusade.
Stalingrad
Atomic Games’ World At War – Stalingrad (1994)
Atomic Games’ World at War Stalingrad is available on the Internet Archives in a DOS Emulator. The game, co branded with Avalon Hill, dates to 1994, and is a classic hex and counter design.