On GOG? Necropolis, maybe, but that ain't very good.
There's aren't very many games like Souls, period. I'd say Nioh, Salt and Sanctuary, and those two bad Deck13 games, Lords of the Fallen and The Surge, are the closest ones out there, and they sure ain't here.
nightcraw1er.488: Dark souls is really, really hard. Not just due to the dreadful port, got all the way through to the Minotaur on the battlements and gave up, it's just not fun. You start, and then die over and over and over, until you level up a couple of times. Then you get into the next area and die and die and die, until you level up enough or cheese your way through a section. By the Minotaur section I was thoroughly fed up with it, and even though I had the hefty bit from above in, I got stuck in the geometry, at which point I erased it permanently. If you enjoy self harm, this is the game for you.
Dark Souls is a game about dying a bunch in order to learn how to not die.
Sounds like instead of learning anything you just tried to brute force your way through stats or cheesing the game. No wonder you found it hard.
tinyE: Isn't Dark Souls notoriously hard or am I thinking of something else?
People latched on to that, and it got heavily used in the marketing by the publisher, but that actually passes off a wrong idea of the game. The game has challenge because the devs believe it provides a more satisfying experience once you overcome it. If they just wanted to make something hard for the sake of being hard, it'd be much easier, but the result wouldn't be as good.
If you get into the game's frame of mind of playing defensively, being aware of your surroundings, not rushing in and trying to hack n' slash everything as soon as you see it, and if you don't mind dying 2 or 3 times at a boss before you beat it, it's really not that hard.