You’ll want to keep client open for the below steps.Here’s how to install Diablo 4 on Steam Deck: Sign in and click the remember login button so you don’t have to worry about signing it again using the on-screen keyboard.Back out of this menu and hit the Play button to launch the client.After that, pull down the drop-down menu and select the version of Proton you downloaded in the section above. Under the Compatibility tab, you want to check the Force the use of a specific Steam Play compatibility tool check box. Instead, click the Hamburger button (button with three horizontal lines) and select Properties. Highlight the Launcher.exe but don’t run it. Navigate to the Non-Steam Games section of your library.Select the Launcher.exe executable from within this folder to add it to your Steam library in gaming mode. Click into your folder to see this path: pfx/drive_c/Program Files (x86)/.Yours will be different but should be easy to find now. For instance, the folder on my Steam Deck mine was 3025301325. Unfortunately, this is hidden in a folder labeled with a ten-digit number, but by sorting it by Modified and Newest, you should be able to find it. You’ll be looking for the folder that contains the installation.

Click the Hamburger button option on the top right of the File Explorer window, choose the Filter option, and then select the Modified and Newest First radial buttons.Make sure to change the File Type to All Files so you can see the executable.Next, click the Browse button and navigate to: home/deck/.local/share/Steam/steamapps/compatdata/ Open the Steam desktop application, navigate to Library, and choose the Add a Non-Steam Game… option.Click the Steam Button, navigate to Power, select the Switch to Desktop option.Back out of this menu and hit the Play button to install.Click the Return to Gaming Mode desktop icon to return to Gaming Mode.Next, click the Browse button and navigate to the program in the downloads folder. Open up a Web Browser and go to the official desktop download page.You’ll want to keep your Steam Deck in Desktop Mode for the below steps.

Diablo 2 steam deck