I felt the itch to play Diablo 2 again so I went and installed Battle.net in Heroic. It failed with Heroic’s "Proton GE (latest) " (whatever that means) but it worked with Proton GE 10.25.
Anyways, it opened the game list already with a filter for “Handheld” applied to only offer me games that work well on a handheld.
The funny thing is that I’m not even running SteamOS but OpenSUSE. But still Wine apparently gave the launcher enough info that it knew I’m on a handheld.
Would anyone care to test this out on a desktop PC? Maybe they equate Wine or Proton with the Deck. But I doubt it, I guess it went by processor or GPU.
Anyways, looks like Blizzard’s unofficial but working Linux support seems to still be a thing.
According to a thread on the blizzard forums, they just forced this mode onto anyone with a mobile GPU.
However, a few replies say it was fixed my the most recent update. Make sure your client is completely up to date.
I’ll try it on my PC when I have a chance tn.