If you are looking to download the game, here are your best current options:
Instead of the original game, most players now buy its sequels, which include all the content of Kharkov 1943 with improved engines and UI: Achtung Panzer: Kharkov 1943 Download PC Game
: The developer's site, Graviteam , still hosts some patches and demo files, but does not typically sell the full digital download directly anymore. If you are looking to download the game,