Alright, so you've tried for days but can't figure out how to fix the Two Worlds II HD - Key Activation problem that you get as soon as you've started the game up.

UPDATE (06/07/2022) - Here is what the guide fixes:

• Two Worlds II HD (Base Game)
  
• Activation Key Issue is no longer a problem
  
• Full Game Is Activated (Should NOT say Demo)
  
• Achievements Work perfectly as well as Steam Cards
  
• Game Should Show version 2.0.5 if you own the base game of Two Worlds II HD
  
• Also works with the latest Single Player DLC "Shattered Embrace" which will bring your game up to version 2.07.03 (thanks RandalMcdaniel!)

With this *FIX* you will not need to download any patches or extra files from any external or 3rd party sites. Also, with this method, the Achievements still work! That makes this the safest & best solution for fixing this problem!

After digging around a bit, and with the help of The First Breed's guide (Solution 2). I have figured out a way to fix the Key Activation problem, simply by editing the registry keys for Two Worlds II HD.

This is a relatively simple fix, as long as you follow the instructions exactly as described.

First, I am going to assume that you know how to use Windows Registry Editor (simply called REGEDIT or regedit.exe). If you are unsure how to use Regedit.exe then I suggest you check out The First Breed's guide first - found here: First Breed's Two Worlds II Key Activation Fix Guide, since he provides enough detail in his guide to get you started with detailed pictures as well... although his solution did not work for me - I had to tweak his solution a bit in order to get Two Worlds II working for me.

So, open up REGEDIT. Then simply "Find" or Manually locate this registry key:

Computer\HKEY_CURRENT_USER\SOFTWARE\reality pump\TwoWorlds2


Once found, click on the sub-folder that says 'Installer' (in this folder you should see a registry key titled Default on the right-hand side of the registry editor window)

Right-Click beneath the key that says 'Default'

Select the option 'NEW > DWORD (32-bit) Value and rename this new registry key: VersionD

Right-Click on the newly named registry key called VersionD and select 'Modify'

Change the hexadecimal value from 0 to 1

Still with me? We're almost done!

Now, click on the subfolder 'SerialKey' (it should be located a few folders below the 'Installer' sub folder found on the left hand side of the registry editor)

Again, there should be a registry key titled 'Default' on the right hand side of the screen.

Once again, now that you're inside the SerialKey subfolder, right-click just below the 'Default' registry key and select 'NEW > DWORD (32-bit) Value and rename this new registry key: VersionD

Right-Click on the newly named registry key called VersionD and select 'Modify'

Change the hexadecimal value from 0 to 1

Once you have finished adding these 2 keys to your registry, close REGEDIT and you are done!

That's it! You are now able to play Two Worlds II HD without any Activation Key problems AND you can still unlock achievements and trading cards!

I Hope this helps anyone who is still having this issue with Two Worlds II HD.

Also, thank you to The First Breed for creating his guide on the community forums.