> - On your Steam Deck, go to desktop mode. Click the `Steam button`, go down to `Power`, and then `Switch to Desktop`. _Wait for your Deck to reboot_. > - Next, open up the browser of your choice, go to the [Blizzard download page](https://www.blizzard.com/en-us/apps/battle.net/desktop?ref=overkill.wtf) (or just search for it on Google), and download the Windows installer. > - Next, we need to add the downloaded `.exe` file to Steam. Open up `desktop Steam`, go to `Library`, and at the bottom left corner, click on the plus sign, then `Add a Non-Steam Game...`. Navigate to your downloads folder by clicking on `Browse`, and then go to `home/deck/Downloads` and add the Battle.net installer file to Steam. Don't forget to show `All Files` under `File type:` if you can't find the installer. > - Now, navigate to the newly added entry in your Steam Library. It should be called something along the lines of `Battle.net-Setup.exe`. **Don't launch it yet**, but instead click on the `cog wheel icon`, then `Properties...` and under `Compatibility`, toggle the `Force the use of a specific Steam Play compatibility tool` option. During the beta, it was important to choose **GE-Proton 7.51** or **Proton Experimental**. [Follow our guide here to learn how to install GE-Proton.](https://overkill.wtf/proton-ge-how-to-steam-deck/) But it seems, it now works without pre-selecting a compatibility layer. > - Now hit `Play` to launch the installer, follow the different steps, and wait until it's done. When the installation process is done, you can remove the `Battle.net-Setup.exe` from Steam again. Right-click it, go to `Manage`, then `Remove non-Steam game from your library`. > - Next, we want to add the installed launcher to Steam. In Desktop Steam,  go to `Library`, and at the bottom left corner, click on the plus sign, then `Add a Non-Steam Game...`. Now we need to look for the file. Click on `Browse` and navigate to the following folder by going through the folder structure: `home/deck/.local/share/Steam/steamapps/compatdata/`.  Don't forget to show `All Files` under `File type:` if you can't find the installer. > - Here you need to search for the latest added folder under `DATE MODIFIED`. It should be a 10-character long number. Open it, and go to the following folder: `pfx/drive_c/Program Files (x86)/Battle.net`. Here select the `Battle.net Launcher.exe` file. Add this one to Steam. If you can't see it, be sure you have `All Files` selected under `File type:`. > - Don't launch it yet, but instead click on the `cog wheel icon`, then `Properties...` and under `Compatibility`, toggle the `Force the use of a specific Steam Play compatibility tool` option, like we did in step four. > - Phew! We're finally done. Launch Battle.net now. If you want to customize the artwork, I propose you [check out the following guide](https://overkill.wtf/how-to-add-steamgriddb/), but don't forget to rename the non-Steam game we've added.