Heroes 6 - Discussion

I encountered some confusion during the game installation. I launched the disc with "Heroes 6: Golden Edition," and the game loaded and updated. I entered the license activation code that was in the Golden Edition box, and the game launched without any problems. Then, I inserted the disc with the "Shades of Darkness" expansion for Heroes 6, and the game reinstalled, restarted, and launched immediately without requiring a code. I exited the game and entered the second license activation code for "Shades of Darkness," but I was told that I already own this game, and the new code in the "Shades of Darkness" package was not accepted. And in Skirmish mode, the Dark Heroes are still not visible.

Added after 24 minutes
Damn! It seems I figured it out through trial and error. I didn't need to exit the game; instead, I needed to enter the "Shades of Darkness" activation code in the "unlock additional content" menu. It turns out that the Complete Edition is already unlocked, along with all the expansions. What a mess.