[seventhtiger]

It's hard to recommend games when you don't have a baseline taste. The past couple of years having a demo became very common on Steam, so I suggest trying some demos.

You've played a 2D platformer and a multiplayer shooter, two very popular genres with massive offerings. If you're interested in more along the same lines, just off the top of my head I'll say try Hollow Knight as a 2D platformer, and Overwatch 2 as a multiplayer shooter (this one is free). Overwatch 2 may be overwhelming for someone new to gaming.

There is a genre called cozy games for more relaxed experiences, like Journey. There are also turn-based roguelikes, and for those I would recommend Balatro.

I don't know about Ubuntu or Linux compatbility so look into that, but I know Steam's OS and Proton have made massive strides.

[bhattisatish]

Journey seems something I will like to try :-)

I wasn't aware of cozy games, but I guess that's what I am looking for. Thanks for the keyword

[seventhtiger]

Then more along those lines is the walking simulator genre. It's called walking simulator generally because combat is not emphasized, with focus on immersion, exploration, and narrative. How puzzly it is varies from not at all to all about the puzzles.

Steam has awesome genre pages so you can search by tag then go to the tag's page and you can see what's hot right now in the genre, what's top selling of all time, what has demos etc. that's why I'm mentioning all the genres.