Project Zomboid, Rimworl, Dwarf Fortress, Stellaris, Starsector...
beerclue
How is duckdns unreliable? I use it just to have wireguard access, been using it for years. Just curious about your issues...
Look into mattermost. Quite powerful, and free.
We're using a self hosted Nexus instance at work. You probably don't need all the features it offers, but it does its job really well. For free, too.
Zen & DDG. Fennec on mobile.
I use Netcup. Reliable, simple, great deals from time to time (such as Black Friday).
Fuzzel works great for me on Hyprland.
While my car was being repaired after a crash, the insurance company gave me a rental to use for the duration. The rental company only had a Land Rover Evoque (or something), and that car had the fancy led matrix lights. It was amazing! You could actually see the light being "shaped" on the road in front, going around incoming traffic, it was constantly moving. To me it was a bit distracting though...
Check your pms.
That guide is great. Also, you can easily find some extra ram on eBay or Kleinanzeigen. I strongly recommend adding at least 4gb. Switching from a 1tb HDD to a 128-256gb SSD should also be pretty affordable and it will do wonders speed wise.
I use webcord and ferdium. But I also tried the official apps and even the web apps with Firefox, chromium or zen. Nope.
I... guess? I don't know how I would classify these games. But they all are able to steal from me 8h in a day, no issue :)