diff --git a/ZeroSpace/ZeroSpace.Web/Components/ReleaseGuard.razor b/ZeroSpace/ZeroSpace.Web/Components/ReleaseGuard.razor
new file mode 100644
index 0000000..1c08d74
--- /dev/null
+++ b/ZeroSpace/ZeroSpace.Web/Components/ReleaseGuard.razor
@@ -0,0 +1,23 @@
+@inject NavigationManager Navigation
+
+@* Route guard: unreleased pages (see SiteMap) bounce to the galaxy map. *@
+@if (_released)
+{
+    <RouteView RouteData="@RouteData" DefaultLayout="@typeof(MainLayout)"/>
+}
+
+@code {
+    [Parameter, EditorRequired]
+    public RouteData RouteData { get; set; } = default!;
+
+    private bool _released;
+
+    protected override void OnInitialized()
+    {
+        _released = SiteMap.IsReleased(RouteData.PageType);
+        if (!_released)
+        {
+            Navigation.NavigateTo("/galaxy", replace: true);
+        }
+    }
+}