Alza sells Eternico mouses/keyboards. It's their in house brand. It's kind of Czech/European made, but in reality it "Made in China" on the bottom.

I'm curious about this as well, but I really doubt that any electornics, like mouses/keyboards are really made in Europe. At least designed in Europe doesn't count for me as European made.

Steelseries is Danish. I don't have a mouse from them but I do have a keyboard and ear buds and they're solid. They have a pretty wide range of mice available so there's probably one to fit your needs.

Endgame Gear is German. I really like their shape, because it's wider than most other mice.

Then there's the Logitech g pro x superlight which was very popular among enthusiasts a couple of years ago. I'm not up to date about the most recent trends though

There are unfortunately no gaming mice made in Europe. End Game Gear makes nice wired esports-centric mice and are based in Germany 🇩🇪, not made in Europe though.

If you do want the closest thing to a made in Europe mouse, the Fair mouse by NagerIT (unrelated to Fairphone) has many parts made in Germany 🇩🇪, but not all (they are super transparent about what comes from where), but it's definitely not a gaming mouse. It could be nice for non-gaming use cases though, and it comes in fun colours too

edit: Here is a chart that NagerIT made detailing what parts are made from where: https://www.nager-it.de/static/pdf/en_lieferkette.pdf

German version if you want that: https://www.nager-it.de/static/pdf/lieferkette.pdf

Not European ( geographically actually the opposite, being based in New Zealand 😅) but not American either. I have very good experience with the Swiftpoint Z2 and can wholeheartedly recommend it! Not cheap an shipping takes a while, but its customizability is just awesome!

https://www.swiftpoint.com/

You can try roccat. My info is quite a few years out of date but they used to make pretty good mice. Think they're german https://myroccat.com/

I’ve been very happy with Logitech’s gaming mice. I’ve been using the G502 and G502 Lightspeed for years now and haven’t had any major issues, though I think these models aren’t produced anymore and I haven’t used their successors.

The company is Swiss, but also operates in the US (listed on both country’s major stock exchanges), so they might not be what you’re looking for. The products are primarily made in China. I’m not aware of any gaming mice being actually made in Europe.