Switch from home-manager steam to system steam

couldn't connect to server or sth. like that otherwise

home/features/games/default.nix

@@ -1,5 +1,5 @@
 {pkgs, ...}: {
   imports = [
-    ./steam.nix
+    # ./steam.nix
   ];
 }

hosts/common/optional/gaming/steam.nix

@@ -0,0 +1,18 @@
+{pkgs, ...}: {
+  environment.systemPackages = with pkgs.unstable; [
+    heroic # Game Launcher
+    lutris # Game Launcher
+    steam # Game Launcher
+  ];
+
+  programs = {
+    steam = {
+      enable = true;
+      remotePlay.openFirewall = true;
+      gamescopeSession.enable = false;
+    };
+    # Steam: Right-click game - Properties - Launch options: gamemoderun %command%
+    # Lutris: General Preferences - Enable Feral GameMode
+    #                             - Global options - Add Environment Variables: LD_PRELOAD=/nix/store/*-gamemode-*-lib/lib/libgamemodeauto.so
+  };
+}