Borderlands 2. Mostly because I was waiting on 3 to be on steam, where it belongs for PC. I'm playing 3 on xbox now.
I play minecraft on bedrock so I don't think it counts as being very old.
Mass Effect: Andromeda.
Not big on vintage gaming. Especially console games.
I have PC games that are pushing 20 years old. But the problem is getting them to actually RUN at this point. Which is a shame because some of them were---and still are---quite good.