diff --git a/Resources/EnginePrototypes/entityCategory.yml b/Resources/EnginePrototypes/entityCategory.yml
index 28e629b9e9a..1e4fe750bf5 100644
--- a/Resources/EnginePrototypes/entityCategory.yml
+++ b/Resources/EnginePrototypes/entityCategory.yml
@@ -18,3 +18,9 @@
   description: entity-category-desc-hide
   hideSpawnMenu: true
   inheritable: false
+
+# Entity prototypes added by the fork. With CVar you can hide all entities without this category
+- type: entityCategory
+  id: ForkFiltered
+  name: entity-category-name-fork
+  description: entity-category-desc-fork
\ No newline at end of file
diff --git a/Resources/Locale/en-US/entity-category.ftl b/Resources/Locale/en-US/entity-category.ftl
index dfdba8fbab3..5ce5aaebeb4 100644
--- a/Resources/Locale/en-US/entity-category.ftl
+++ b/Resources/Locale/en-US/entity-category.ftl
@@ -7,3 +7,6 @@ entity-category-desc-spawner = Entity prototypes that spawn other entities.
 
 entity-category-name-hide = Hidden
 entity-category-desc-hide = Entity prototypes that should be hidden from entity spawn menus
+
+entity-category-name-fork = Fork Filtered
+entity-category-desc-fork = Entity prototypes added by the fork. With CVar you can hide all entities without this category
\ No newline at end of file
diff --git a/Robust.Client/UserInterface/Controllers/Implementations/EntitySpawningUIController.cs b/Robust.Client/UserInterface/Controllers/Implementations/EntitySpawningUIController.cs
index 70eab2f376e..5b89262c397 100644
--- a/Robust.Client/UserInterface/Controllers/Implementations/EntitySpawningUIController.cs
+++ b/Robust.Client/UserInterface/Controllers/Implementations/EntitySpawningUIController.cs
@@ -7,6 +7,8 @@
 using Robust.Client.ResourceManagement;
 using Robust.Client.UserInterface.Controls;
 using Robust.Client.UserInterface.CustomControls;
+using Robust.Shared;
+using Robust.Shared.Configuration;
 using Robust.Shared.Enums;
 using Robust.Shared.IoC;
 using Robust.Shared.Prototypes;
@@ -19,6 +21,7 @@ namespace Robust.Client.UserInterface.Controllers.Implementations;
 
 public sealed class EntitySpawningUIController : UIController
 {
+    [Dependency] private readonly IConfigurationManager _cfg = default!;
     [Dependency] private readonly IPlacementManager _placement = default!;
     [Dependency] private readonly IPrototypeManager _prototypes = default!;
 
@@ -192,6 +195,9 @@ private void BuildEntityList(string? searchStr = null)
         _window.SelectedButton = null;
         searchStr = searchStr?.ToLowerInvariant();
 
+        var categoryFilter = _cfg.GetCVar(CVars.EntitiesCategoryFilter);
+        _prototypes.TryIndex<EntityCategoryPrototype>(categoryFilter, out var filter);
+
         foreach (var prototype in _prototypes.EnumeratePrototypes<EntityPrototype>())
         {
             if (prototype.Abstract)
@@ -204,6 +210,11 @@ private void BuildEntityList(string? searchStr = null)
                 continue;
             }
 
+            if (filter is not null && !prototype.Categories.Contains(filter))
+            {
+                continue;
+            }
+
             if (searchStr != null && !DoesEntityMatchSearch(prototype, searchStr))
             {
                 continue;
diff --git a/Robust.Shared/CVars.cs b/Robust.Shared/CVars.cs
index 8228eb19228..c57b3ea6909 100644
--- a/Robust.Shared/CVars.cs
+++ b/Robust.Shared/CVars.cs
@@ -683,6 +683,13 @@ protected CVars()
         public static readonly CVarDef<string> BuildManifestHash =
             CVarDef.Create("build.manifest_hash", "");
 
+        /// <summary>
+        /// Allows you to disable the display of all entities in the spawn menu that are not labeled with the ShowSpawnMenu category.
+        /// This is useful for forks that just want to disable the standard upstream content
+        /// </summary>
+        public static readonly CVarDef<string> EntitiesCategoryFilter =
+            CVarDef.Create("build.entities_category_filter", "");
+
         /*
          * WATCHDOG
          */