We had Blade of Darkness here but not anymore, which was somewhat of a precursor to Dark Souls.
There are games that are similar in gameplay but not in style and not all are technically rpg's like Furi or Hyperlight Drifter.

get a playstation and play bloodborne and demon's souls

I already own those. ;)

Not really rpg, more of a metroidvania, but did you try Hollow Knight?

No, i didn´t. The atmosphere looks qutie nice on this one. Is it a hard game?

I'd say so. Not at the beginning tho, it gives you time to learn the ropes. Later on quite brutal.
But at the same time it is quite fair.

Pharaonic is hands-down the most Dark Souls-like game on GOG.

https://www.gog.com/game/pharaonic

Any idea of how Die by the Sword and Deathtrap Dungeon compare to that? I only own the latter and found it kind of a pain to play; Die by the Sword is supposed to be better, but I didn't dare buy it because GOG officially only supports Win XP, Vista and 7 for that. Both have pretty ugly and dated graphics though, Blade of Darkness looked much better. A shame that it isn't available anymore (I was lucky enough to get it when it was, but I feel bad for those who didn't). Huh? That's another game that completely flew under my radar; never heard of it, never knew it was part of GOG's catalogue. Thanks for putting a spotlight on it.

What about Examina? Has anyone tested it so far?

Bloodborne is the only game this "gen" that I wish had a PC version which does not. Bums me out. Reminds me of Red Dead last time.

You could take a look at salt and sanctuary, it reminds me of dark souls a lot, although it is in 2D.
Nioh take some stuff from dark souls, it also take even more from hack&slash. It's basically dark souls meet path of exiles.
You can also look at the surge, i have not tried it but it is supposed to have some elements of it.
You could even try the king's field serie made by from software long before the souls, never tried it, heard it is kinda bad.

Necropolis is blatantly trying to be like Dark Souls. I wouldn't know exactly since I refunded my copy when HBS decided to cripple the main feature of the game, the multiplayer after promising to get it working. They just quietly abandoned it and released other games I won't buy.

Thank you for asking this question. I'm interested in this as well. I love the suggestions that have so far been given as I'm looking into some of the games and now I have new ones on my radar.

I haven't played both Deathtrap Dungeon and Die by the Sword so I can't comment on that.
Personally I found Blade of Darknees a LOT better than Dark Souls but I admittedly only played the borked PC version of it which had horrible controls.
This guy with the weird accent may explain Blade of Darkness better than I can.

https://www.youtube.com/watch?v=pNK0_G0CGvk