Slay the Spire is a rogue-like deck building card game. If you like card games it's worth a look. It's very good.
Monster Train is another deck builder card game that folks really like, I think Spire is a bit better.
Hades is a challenging rogue like that is extremely well done.
All the old id Software games are on there. The two new Doom games are fun.
The PC version of City Skylines is a fun city builder, I assume the console version is also good.
Darkest Dungeon is a turn based game that can be challenging but really good.
Enter the Gungeon is a twin stick shooter rogue like that is highly regarded.
If you've never played the old Lucas Arts point and click adventure games Grim Fandango and Full Throttle they are worth a look. Two of the best in the genre and a big nostalgia hit.
Hollow knight is a metroidvania people really love. Can be challenging.
Ori and the Blind Forest and it's sequel are both excellent metroidvania games
Lonely Mountain Downhill is a chill but also challenging mountain biking game that is pretty fun.
Overcooked 2 is a local co-op cooking game that can be very fun and challenging, but only play it with someone you have a rock solid relationship with. I have to believe this game has caused divorces.
Star Wars Jedi Fallen Order is a star Wars dark souls game that is well done.
All the Yakuza games are on there. They're a bit crazy but are good if you like the genre.