Rin

No Man’s Sky - One of the most beautiful games out there imo, and has vastly improved since its disasterous launch. Warning this one does require an internet connection (actually for a good reason) but you dont have to interact with anyone, and it’s difficult to even encounter another player in the wild outside of the Anomaly hub and campaigns due to its sheer size.

Project Zomboid - Even if you have zero interest in zombie stuff it’s still worth a shot. Has a massive detailed world based off Midwestern towns in the midst of a zombie apocalypse. It’s still in development so there’s some noticeably unfinished aspects, and they’ve only just begun to add non-zombie NPCs.