Hey people!
Finly somone shared fineda way to play BDO on Geforce Now non steam version!

Here is how

[Update: you must also own/buy BDO on steam for this to work]

1. Launch BDO from the Geforce Now launcher.

2. When loading finishes, it will prompt you to register an account if you don't have a steam account.

3. Close that BDO launcher within the Geforce Now window.

4. Maximize the Steam tab on the bottom of the screen.

5. Right-click BDO on the left se column and select "properties".

6. In the text box under "Launch Options" type: %command%aaa

7. Close the properties window and relaunch BDO in the already opened steam window.

8. Your BDO will now always prompt you to login like on client.

Who would use this?

I guess someone with good internet but a potato PC...

Some CONs to doing this is that you will most likely have slightly higher ping (+10-30ms depending on where you live) and also will be locked at 60fps.

Here is the original post
https://www.reddit.com/r/blackdesertonline/comments/o39u2a/short_gue_to_play_nonsteam_version_of_bdo_with/

Update
Geforce Now stoped the method so it is not good to use the command
It will block you from playng ANY steam game and you will have to wait support to unblock it

So its not recomended to do this for now
Lets hope that they will add a new way to play non steam bdo 

Ohh it was fun....

You can play it starting on October 6th, 2022.... Well, at least that's what Pearl Abyss published, but I have been trying since they announced it and I have nott been able to play. It allows you to choose server and character, it even loads most of the loading bar, but when the game is about to start, it closes xD Just gonna give it some time.