The Souls Games. So, Demon Souls, Dark Souls 1-3. Maybe even Bloodbourne. Haven't played the first and last of those mentioned but if you like Souls you'll likely enjoy them.
Great games with so many ways to play and enjoy. Lots of secrets to dive into. Tons of lore you can figure out yourself for your story of what happened and you dig and try to figure out a narrative.
PvP ganking and honour duels, PvE co-op or solo challanges. Tons of replayability.
If you're interested I play on PC and found on steam as CorprealFale these days. Up to mess around in any of them and will help to run through and trivialize content in the first one doing boss rushes!
(If anyone tells you you play a souls game "wrong". They are dicks. They are also far from as hard as people say, they just play very differently from most common games.)