@Khwarezm89 As a fan of dark fantasy, I can second a few of the ideas already noted — that being Dragon’s Dogma (I haven’t played DD2 yet but the first game was great fun in a dark-ish fantasy setting and DD2 is by all accounts better and fine to jump into without playing the first), and the Dark Souls series.
Probably you’ve considered the Dark Souls games and might be averse to the famous Souls-like gameplay style, but for a sheer setting, they are quintessential dark fantasy in that regard.
Now to add a few other ideas — I guess it’s all about whether it’s the dark fantasy setting you want, or rather the open world action RPG setting (like the HZD and AC games). Probably you’d like to have a game that fits both. If so you might consider the Shadow of Mordor and Shadow of War games. Set in Tolkien’s fantasy defining LotR world, they have all the elements of orcs and evil enemies, dark setting and narrative, swordplay and magic, etc. all with a coating of Ubisoft tower open world gameplay loop. I actually never got around to Shadow of War, the second game, but it was supposed to be better than Mordor and for me Mordor was a solid 7.
But if you want a fantasy action game (not strictly dark fantasy, but..) then the God of War games are in the ballpark. Lots of monsters, swordplay, magic, etc. Not true open world and a little more linear, but have some openness within regions.
Also, if you like the AC series, then Ghost of Tsushima is an easy recommendation. Not dark fantasy, more historical fiction, but really fun and beautiful gritty open world action game.
Other open world action RPGs that are fantasy, just not necessarily “dark” fantasy, but still have monsters, bows and arrows, swords, and magic — Immortals: Fenyx Rising and Kena: Bridge of Spirits can definitely scratch an open world itch. Setting of those is more bright and cheery and even semi-humorous, despite slaying fantastical beasts.
Lastly (and I’m just looking at what I’ve played for inspiration), Final
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