diff --git a/.gitmodules b/.gitmodules
index 3c8c80d..dacf3fd 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -79,3 +79,6 @@
 [submodule "plugins/gratitude"]
 	path = plugins/gratitude
 	url = https://github.com/BlythT/Gratitude-Millennium-Plugin
+[submodule "plugins/steam-protondb-plugin"]
+	path = plugins/steam-protondb-plugin
+	url = https://codeberg.org/ribbon-studios/steam-protondb-plugin.git
diff --git a/plugins/steam-protondb-plugin b/plugins/steam-protondb-plugin
new file mode 160000
index 0000000..08f9f14
--- /dev/null
+++ b/plugins/steam-protondb-plugin
@@ -0,0 +1 @@
+Subproject commit 08f9f1445de023ee607ce97746fdfe201d9091b2