i dont know for sure because i have a windows pc, but im sure new Macos versions with a specific M chip will work with steam still hun, you dont have to be upset about it
i do have Steam of course... but macos games only work with macos and 'Buckshot Roulette' is pc only so far looks like. i'm not upset, just hoping it gets an official mac release someday, looks like everyone is having fun with it! 🤓