Gaming

Starsector. Sseth has a really good review of the game.

Stronghold Crusaders, or Command and Conquer.

Nostalgic childhood games.

Tales of Maj'eyal is my go-to roguelike when I have some down time on laptop.

mindustry is amazing. https://mindustrygame.github.io/ you will lose days of your life playing this game.

Cave Story is good / hectic / hard platformer. I might be wrong but I think it was made for Linux first

Also, if you install RetroArch, you can play all the emulated systems.

Most indie games that are deck verified should work just fine. I'm playing DREDGE on my deck at the moment - absolutely recommend this one and the battery life is phenomenal. Apart from that Factorio or FTL will keep you busy for days (and nights...)

Neither RPGs nor choose your own adventure games, but I'll leave Celeste, Hollow Knight, and Cuphead here anyway

One Hour One Life and Two Hours One Life (open source) can be run on pretty much any computer.
The concept is: you're born as a baby or a fertile woman and you have to gather and build to survive. Your maximum age is 60 years (OHOL) or 120 years (2HOL) and you hunt, gather, build tools, have babies and raise them. You can become the matriarch of a huge multigenerational family and build towns, buildings, farms, roads and weapons. People keep adding to it, I haven't played in awhile but I think they have cars and airplanes now.
The graphics are MS Paint-quality but the gameplay is so incredibly fun. Highly recommend.
edit to add: also after you die you can go look at your offspring and their offspring, whether they're still alive, what they died of etc. It's a great community game. You can also run private servers if you want to play with friends instead of strangers.

If you like Pokemon like games, take a look at Cassette Beasts! Very charming game!

Maybe I haven't scrolled far enough, but haven't seen anyone recommending Persona, if so I definitely recommend it, in this case, Persona 4, which I played.

There's also Fable Anniversary, the classic Xbox exclusive RPG, both games are also Deck Verified.

I recommend Baldurs Gate, BD 2. Good games. Also Planescape Torment.

Chrono trigger for SNES, ff 7,8,9 for psx. If you can run citra bravy default. Final fantasy 3 for PSP, ff tactics for GBA.

If you like roguelikes I'd recommend Dungeon Crawl Stone Soup.

If you're looking for a mario kart alternative there is Super Tux Kart.

ofc battery drains if not connected to the electricity network man, these graphics card are not meant to run games if not when they are charging

Anyway you can try SuperTux and Xonotic