Were you hoping to play Destiny 2 on Steam Deck or a Linux desktop using Proton? Well, you're currently out of luck. Their updated Steam Guide has a newer section just for Steam Deck and it's not good news.
Like a lot of bigger games, they don't support Linux either natively or at all and right now it appears they don't have any plans to either. It reads:
Destiny 2 is not supported for play on the Steam Deck or on any system utilizing Steam Play's Proton unless Windows is installed and running. Players who attempt to launch Destiny 2 on the Steam Deck through SteamOS or Proton will be unable to enter the game and will be returned to their game library after a short time.
Players who attempt to bypass Destiny 2 incompatibility will be met with a game ban.
I've already seen a few places jump on that last line but it's pretty normal. Anyone who works around anti-cheat in online games, would face a ban. I mean, that's obvious really isn't it?
For Destiny 2 to work with Proton if they decided not to bring over their Stadia Linux port to Steam, one thing Bungie would need to do is speak to BattlEye which it now uses, although that's only supposed to be a little email away to get hooked up.
Meanwhile, I don't want to hype it up too much just yet but Apex Legends now works on Linux with Proton and the Steam Deck. I even captured a little rough video for you. No confirmation yet to be clear so it's not official as far as I am concerned, so I'm hoping it's not another case of a game that will stop working in a day or two like has happened previously with multiple games. Given the Steam Deck is here though, and Apex had a dedicated Steam Deck branch we saw on SteamDB — I remain hopeful on that.