Start on the map Red Army Trainingĭemolition. These codes are only valid for version 1.0 of COD2 and may be altered or removed from later versions. The following codes may be entered for effects. While playing, drop the dev-console via the tilde key and input developer 1 to enable code recognition. In the game's options menu, enable the console. Set the value of that string and all other 'seta_mis_' lines following it to 10 or higher to unlock those stages on Veteran difficulty. Open it using Notepad and locate the 'seta mis_01' string. Locate the config.cfg file in the COD2 directory - a focused file search will find it easily.