Playing on Sinfar requires NWN including both its expansions, Shadows of Undrentide and Hordes of the Underdark. Today, these come bundled in NWN Diamond Edition available in CD Format from Amazon or Ebay or if you purchase a copy of NWN Enhanced Edition from GOG.com (the latter is highly recommended in this case).

If you have any issue, we can help you on Discord: https://discord.gg/jVaNBmj

This is where you will extract all the installation files.
NWN Diamond installation is portable so you can put it anywhere, even on a USB key.

In this case I will use “C:\MyGames\Clean_NWN_Install”:

The only file that matters from your previous installation is this nwncdkey.ini file. You can Find it at one of the following locations:

• At the root of your previous NWN installation:
  
  
  
• From your GoG library:
  
  In this case, you have 2 options:
  • Create a new text file (using notepad for example) and add the following:

    [CDKEY]
    Key1=XXXXX-XXXXX-XXXXX-XXXXX-XXXXX-XXXXX-XXXXX
    Key2=XXXXX-XXXXX-XXXXX-XXXXX-XXXXX-XXXXX-XXXXX
    Key3=XXXXX-XXXXX-XXXXX-XXXXX-XXXXX-XXXXX-XXXXX

    Then replace the “XXXXX-XXXXX-XXXXX-XXXXX-XXXXX-XXXXX-XXXXX” by your keys, where:
    Key1 = Neverwinter Nights Key
    Key2 = Shadows of Undrentide Key
    Key3 = Hordes of the Underdark Key

  • Or wait to launch the game to enter your CD keys manually when it starts:
    

If you want to use your own custom NWN installation, then you will at least need those Sinfar-specific files:

• SinfarX: PAGE INFO ALREADY TRANSFERRED TO THE NEW WIKI - Sinfar Client Extender (SinfarX)
• Sinfar .haks/.tlk and override files: PAGE INFO ALREADY TRANSFERRED TO THE NEW WIKI - Hak Files

To launch the game, you need to run sinfarx.exe:

For the next steps, go back to PAGE INFO ALREADY TRANSFERRED TO THE NEW WIKI - How to Play

NWN Diamond works well on Linux too, instructions are here: PAGE INFO ALREADY TRANSFERRED TO THE NEW WIKI - NWN Diamond on Linux