Half-Life and Half-Life 2 have plenty of really good mods if you are interested in those, Black Mesa started as just a mod as well.

Some of my favourites for HL2:

• Entropy: Zero Two (on the same level of quality as Black mesa and its free on Steam)
• Nightmare House 2 (now named Nightmare House: The Original mod)
• Half Life 2: MMod

Some of my favourites for HL1:

• Half Life: Field Intensity
• Half Life: Delta Particles
• Half Life: MMod

There are many more that I haven’t mentioned / played myself.

My top four on steam are:

• Garry’s mod - 2800 hours
• CS:GO (CS2 now) - 2100 hours
• Terraria - 1000 hours
• Team Fortress 2 - 555 hours

Same over here :)

• Valve
• From Software
• Re-Logic
• Team Cherry
• ppy

They’re great on certain desktops, like Fedora’s Atomic Desktops, but you usually have to work around Flatpak specific issues. On NixOS there doesn’t seem to be a declarative way to install them.

Have you tried Open Tablet Driver (if your tablet is supported)? I use it on Wayland and it works perfectly for me, but I’m not an artist and I only use it to play osu!.

You could try LibreWolf.

Hollow Knight