Install Flatpaks

Download and install the Protontricks and Flatseal flatpaks.

Both P4G and Reloaded II, the program we use to mod it, are Windows binaries, but we can't install the modding prerequisites for P4G CEP the traditional way on Linux.

We'll need some additional tools in order to get Reloaded II working on the Steam Deck:

• Protontricks: This tool lets you configure the Proton compatibility layer for Steam games—it's like Winetricks, but for Proton! We'll use it to install the prerequisite runtimes Reloaded II needs.

• Flatseal: This tool lets you configure the permissions given to flatpak applications. We're going to use it to give Protontricks access to your microSD card.

Useful Terms

• Proton: A compatibility layer by Valve that can make Windows games run on Linux. It's a combination of two other open-source projects, Wine and DXVK.

• Flatpak: A platform for running packaged applications called flatpaks. Flatpaks are the ideal way to get new software on the Steam Deck and other immutable distros as they will persist between major OS updates.

• Flathub: Think of this as the "app store" for flatpaks. It's a repository where creators and community maintainers can upload flatpaks for users to install.

• Discover: A software center application by KDE that lets users easily browse, install, and update flatpaks.

Install Prerequisite Flatpaks

Want to use the command line instead?

flatpak install flathub com.github.tchx84.Flatseal
flatpak install flathub com.github.Matoking.protontricks

Launch Discover

• Open the application launcher and launch Discover under the System tab.

Install Flatseal

• Find the search bar in the top-left of the Discover window and search for Flatseal.

• Once it appears on the right, select Flatseal.

• Select Install in the top-right. Do not launch the program yet!

Install Protontricks

• Use the search bar again to search for Protontricks.

  • Once it appears on the right, select Protontricks.

  • Select Install in the top-right. Do not launch the program yet!

Moving On

Steam and P4G