With the Bethesda Launcher shutting down, they've begun the migration to Steam and now some of their classics have become available to download easily.
The titles that have newly arrived on Steam are:
- The Elder Scrolls Arena (free)
- The Elder Scrolls II: Daggerfall (free)
- The Elder Scrolls Adventures: Redguard
- An Elder Scrolls Legend: Battlespire
- Wolfenstein: Enemy Territory (free)
You can play them all pretty easily on Linux and the Steam Deck too. Probably the best way is with the likes of Luxtorpeda, a Steam Play tool that helpfully downloads Native Linux game engines. So you would grab Luxtorpeda (using something like ProtonUp-Qt, see my guide) and set Luxtorpeda on them in Steam and it would do the magic for you.
Luxtorpeda will set Wolfenstein: Enemy Territory on Steam to use the far superior ET: Legacy (although there is a Flatpak for this), The Elder Scrolls Arena will use the in-progress OpenTESArena project, and then both Redguard and Battlespire will use a Native Linux version of DOSBox.
As always, just a suggestion, set them up however you want.