iirc this is typically called quasi-perfect pitch; essentially it’s relative pitch but a few reference pitches are memorized

“Plastic Boogie” - King Gizzard and the Lizard Wizard

“PROPER RHYTHM (ALL THERE IS TO IT)” - UNBEATABLE/D-CELL

Think I found the repo; you’d just need to have the appropriate packages & build it https://github.com/fioncat/kde-runcat

Not currently at computer so can’t make a list of commands, but someone else might be able to (or AI if you trust it)

This. You can use something like ProtonPlus (available as a flatpak/on Discover) to install/update ProtonGE if you’re feeling lazy, and can set the default compatibility layer in steam settings so you don’t have to adjust it for every game

Also, fellow OpenSUSE+KDE user here :)