Going to depend on what you like. But my favorite modern games have been Rimworld, Skyrim (still part of the internet era), and Planet Zoo. I love how all of these games provide hundreds of hours of possible gameplay without getting stale.

And if you have VR, Pavlov has been the most fun I have ever had gaming. It looks like a CSGO clone on the surface but it becomes the most absurd/surreal experience ever with custom maps. It's almost like playing laser tag in one of those optical illusion room of mirrors type attractions.

Indie games might be a good place to start. Whatever genre of older games you are into, there are probably new indie games exploring the same ideas.