The base edition of Black Desert Online is completely free as long as you “purchase” before the end of the promotional period (March 2).

You can get it either through the regular site with the standard client, or via Steam. Personally, I recommend getting it through the regular client, but if you like to keep all your games in one place — and want to take advantage of Steam’s features while you play — then that’s an option too. Shoot, it’s free why not grab it on both?

Here are the links (you can also Google):

If you miss the free period, I do have a few guest passes leftover which offer up to 7 days free. Just let me know and I’ll send it out to you. Right now you have plenty of time before March 2, however.