If you already have the game installed but want to bypass the progression to access all items immediately, some community sources suggest using a specific "Unlock Coderar" command.
If you have the physical CD and a valid code, follow this exact process for Windows 10/11: alien shooter 2 conscription unlock code install
For the modern version of the game, there is no "secret code" for installation. Accessing the full version is typically handled through official digital storefronts: If you already have the game installed but