depends what you want. For a beautiful story and art go for Nier: Automata. If you want a challenge then I recommend Sekiro or Souls series. And if you just want to hang around in the open world then go for the new AC entries
The yakuza series is great, yakuza 0 is good by itself because you can stop after you beat it, however if you decide to get into 1, for a complete experience you gotta go through 1-7
I think My Friend Pedro is a pretty fun and replayable single player game. You wake up with a talking banana helping you escape this place full of armed guys and as you progress you get better weapons and the enemies get harder. It’s fun because you have the ability to slow down time and do all types of parkour like moves over obstacles or people. I’d definitely recommend playing it with some badass music
Hi mate, heres a list of my favorite single player games:
The last of us
Doom (the gameplay is amazing)
Star Wars Fallen order
God of War (the full saga)
Beyond two Soul