First of all, happy new year (maybe?)
- Steam
- Windows (or you can try using an old launcher for the game, it might not work though)
- Proton GE (I'm using 10-27)
Obs:
I'm using Arch, you might need to do some tweaking if you're using a different distro
- Download the windows version on their official website
- Run the installer with w/e program you're familiar with. For example, Lutris, Heroic, Faugus, and so on. In my case, I used Heroic to install the game.
- Just run the initial installer, it won't download anything, because it's missing some dependencies from windows, but it will create a NIKKE folder under your prefix (if you already know where the folder is supposed to be placed in your prefix, you can skip this part)
- Open your Windows OS, and install the launcher. For reference, I installed the whole game (~22gb), but you can try with just the initial client files...
- Copy the whole NIKKE directory to a USB or upload it somewhere idk
- Back to your Linux, replace the folder created by the installer with the one you just plucked from windows
- Add the game to steam and force compatibility to run with Proton GE. Also, you might have to run & cancel a few times if it doesn't open right away
Congratz, you have NIKKE running under wine!
Important: Just letting you know ahead of time, your account can be banned! I can't confirm anything yet, so do this at your own risk. Imma yolo with my main account, if I get banned f it. I have skins, but I can't be bothered to play using my phone or with a dual boot...

Indeed, it was a mistake on my end. I left those steps out, assuming you would already know for some reason lol, sorry for that. As for hiding the wine version, you can just open your prefix winecfg and tweak the options there.
I'll keep updating this if I find any issues while playing. If you find a bug that needs fixing, feel free to leave a comment as well. I'm assuming this will help others in the future
As for the issue that I have to keep restarting the game, it has something to do with this timeout:

Whenever it times out, the game refuses to open, and I'm forced to restart. I'll see if I can find a fix whenever I have some free time, but for now, restarting is the workaround.