Astaroth

For me I just found it annoying that whenever we wanted to go in different directions one player would end up getting dragged back by the camera border. So many failed jumps...

But that's fair, if someone thinks that being able to get in the way of each other and being forced to cooperate better due to it adds to their enjoyment of the game then playing the games without split screen could be preferable.

I just never considered that possibility.

Lego games like Lego Starwars has already been mentioned and I will second those (especially the newer ones that have split screen).

Divinity Original Sin is also great.

Honestly most games I can think of have already been mentioned and those who have not seem like they might not be that great of an option since it seems your partner isn't normally into gaming. (RTS in particular might be too hard)

But I will suggest some anyway just in case

Starcraft 2 has free online multiplayer which includes a COOP vs AI mode.

There's also a 2 player campaign adaption of Warcraft 3's normally single player campaign. Although it might only be available for pre-Reforged.

Also I didn't know about it before now, I googled it just in case, but apparently SC2 also has COOP mods for its campaigns.

You mentioned having a Switch so I will recommend Advance Wars Reboot and Wargroove 1 & 2, although there are no COOP campaigns but you can play multiplayer maps.

Besides Advance Wars Reboot Camp on Switch (or the originals for Gameboy, which you could play with emulator), there's also an online fan site called Advance Wars By Web where you can play advance wars in the web browser, although there's no single player.

Wargroove is also on Steam and besides the campaign and regular game itself there are puzzles.

And speaking of Puzzles, card games tend to have Puzzles. I haven't actually played Magic, Yu Gi Oh, etc. so I can't say for sure whether they have any, but there's puzzles in Faeria. (I would've recommended Might and Magic Duel of Champions, it had some great puzzles, but Ubisoft shut that game down many years ago)

I second the Lego games. Although the older ones (Complete Saga) & Lego Indiana Jones were annoying to play COOP because there's no split screen.

But Lego Star Wars Clonewars has split screen so you don't get in the way of each other. I haven't actually played other newer Lego games but I assume they will have split screen as well.

Why are you using Chinese enumeration commas?

i.e. "、" instead of ","

All I know is wine-mono and wine-gecko doesn't come in any default package lists on apt that you get on Linux Mint (which should include Debian and Ubuntu packages), not sure if they exist on some other mirror list somewhere but it didn't seem like it, while on Arch I got them directly from Extra (not even AUR).

Well you technically don't need mono or gecko, especially not if you're just going to use Steam Proton to play, but I use pure WINE a lot and it was a pain having to install them manually. Eventually I gave up on using mono and just downloaded the .net runtimes I needed through winetricks.

There were also some lib32 package I got from AUR on Arch that didn't exist on apt. One of those gst plugins (ugly/good/bad/nice/whatever)

ZQ

yeah to exit without saving you do ZQ instead of ZZ

I thought about upgrading to AE a few times since it seems to have pretty much everything or at least replacements for everything now, but I guess I'll never upgrade from 1.57.97 at this rate

IKEA used to sell great mattresses, but when I had to replace my old one a few years ago they only had hard and semi-hard ones.

And over time the mattress I ended up buying because they didn't sell the one I wanted anymore sunk in and has formed an uncomfortable indent.

same reason why people buy games even though they can pirate them to get them for free

Been a while since I had a VM but iirc it was pretty easy to have a shared directory to the VM, which is very useful to (obviously) share files but it also means that since the files aren't actually on the VM itself they'll still be there even if you remove the VM since they're not part of the image.

How I learned my lesson to have a shared directory was this: I had been having audio issues on the VM and at one point just decided to start over with a new VM, completely forgetting that the files I had been working on for a project were part of the VM and would be gone.

Just the other day I was looking into how to use a single shared WINE prefix for multiple users since it's not like any 2 users would ever use the same PC at the same time... TIL I was wrong

Unfortunately I don't really have anything helpful to add except it seems like Linux is more or less inherently built to support what you're looking for.