For those unaware, BattlEye has recently announced that they are added support for Steam's Proton Linux compatibility layer. This allows Linux users to play some Windows games on Linux. At the moment, playing Destiny 2 is not possible as the anti-cheat gets flagged.
This new added support for Proton is on an op-in basis, and as far as I'm aware, it is simple to opt-in.
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At this moment, Destiny 2 is the main reason I have stayed on Windows but that door is soon to close since I am beyond tired of maining my rigs in Windows as I refuse to move to w11 due to the BS hardware requirements. Currently I am working on deploying a Arch based environment since that is what Valve/Steam have been using with alot of luck for the SteamDeck/SteamOS 3 for Proton compatibility - so far all of my hardware has support and I can make my Nvidia drivers work flawlessly until I swap out to a RX6900/6950XT to end some of the backend work that is needed on Green Teams side. In this day and age there is no reason other than laziness not to support a Linux branch like SteamOS/Arch since BE has been working hard in this area to allow support. The Linux community has been doing all of the heavylifting for studios to ensure compatibility for free, so why not let us carry this to the finish for you Bungie.