diff --git a/overlays/simple.nix b/overlays/simple.nix
index 9ea2236..d85d8e3 100644
--- a/overlays/simple.nix
+++ b/overlays/simple.nix
@@ -28,4 +28,14 @@ in {
   animedl = prev.animedl.overrideAttrs (old: {
     extraPkgs = pkgs: with pkgs; [ mpv ];
   });
+
+  retroarch = prev.retroarch.override (old: {
+    cores = with pkgs.libretro; [
+      desmume
+      sameboy
+      mgba
+      mupen64plus
+      parallel-n64
+    ];
+  });
 }