Update

Author: IntoTheDev

Runtime/EditorStorage.cs

@@ -0,0 +1,34 @@
+#if UNITY_EDITOR
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEditor;
+#if ODIN_INSPECTOR
+using Sirenix.Utilities.Editor;
+#endif
+
+namespace ToolBox.Loader.Editor
+{
+	public static class EditorStorage
+	{
+		public static List<T> GetAllAssetsOfType<T>() where T : Object
+		{
+#if ODIN_INSPECTOR
+			var assets = AssetUtilities.GetAllAssetsOfType<ScriptableObject>().ToArray();
+#else
+			var paths = AssetDatabase.GetAllAssetPaths();
+			var assets = new List<T>();
+
+			foreach (var path in paths)
+			{
+				var asset = AssetDatabase.LoadAssetAtPath<T>(path);
+
+				if (asset is T value)
+					assets.Add(value);
+			}
+
+			return assets;
+#endif
+		}
+	}
+}
+#endif

Runtime/EditorStorage.cs.meta

@@ -0,0 +1,7 @@
+namespace ToolBox.Loader
+{
+	public interface IInitializableBeforeBuild
+	{
+		void Init();
+	}
+}

Runtime/IInitializableBeforeBuild.cs

@@ -0,0 +1,4 @@
+namespace ToolBox.Loader
+{
+	public interface ILoadable { }
+}

Runtime/IInitializableBeforeBuild.cs.meta

@@ -1,9 +1,9 @@
 using System.Collections.Generic;
 using System.Linq;
-using UnityEngine;
-#if UNITY_EDITOR && ODIN_INSPECTOR
-using Sirenix.Utilities.Editor;
+#if UNITY_EDITOR
+using ToolBox.Loader.Editor;
 #endif
+using UnityEngine;
 
 namespace ToolBox.Loader
 {
@@ -15,7 +15,7 @@ public static class Storage
 		private static void Setup()
 		{
 #if UNITY_EDITOR
-			var assets = GetAssets();
+			var assets = EditorStorage.GetAllAssetsOfType<ScriptableObject>().ToArray();
 #else
 			var assets = Resources.LoadAll<ScriptableObject>("");
 #endif
@@ -28,7 +28,7 @@ public static T Get<T>() where T : ScriptableObject, ILoadable
 		{
 #if UNITY_EDITOR
 			if (!Application.isPlaying)
-				_assets = GetAssets();
+				_assets = EditorStorage.GetAllAssetsOfType<ScriptableObject>().ToArray();
 #endif
 
 			for (int i = 0; i < _assets.Length; i++)
@@ -42,25 +42,10 @@ public static IEnumerable<T> GetAll<T>() where T : ScriptableObject, ILoadable
 		{
 #if UNITY_EDITOR
 			if (!Application.isPlaying)
-				_assets = GetAssets();
+				_assets = EditorStorage.GetAllAssetsOfType<ScriptableObject>().ToArray();
 #endif
 
 			return _assets.Where(a => a is T).Cast<T>();
 		}
-
-#if UNITY_EDITOR
-		private static ScriptableObject[] GetAssets()
-		{
-#if ODIN_INSPECTOR
-			var assets = AssetUtilities.GetAllAssetsOfType<ScriptableObject>().ToArray();
-#else
-			var assets = Resources.FindObjectsOfTypeAll<ScriptableObject>();
-#endif
-
-			return assets;
-		}
-#endif
 	}
-
-	public interface ILoadable { }
 }

Runtime/ILoadable.cs

@@ -5,7 +5,7 @@
 using UnityEditor.Build.Reporting;
 using UnityEngine;
 
-namespace ToolBox.Loader
+namespace ToolBox.Loader.Editor
 {
 	public class StorageBuildProcessor : IPreprocessBuildWithReport, IPostprocessBuildWithReport
 	{
@@ -18,14 +18,20 @@ public void OnPreprocessBuild(BuildReport report)
 			if (!AssetDatabase.IsValidFolder("Assets/Resources"))
 				AssetDatabase.CreateFolder("Assets", "Resources");
 
-			var loadables = Resources.FindObjectsOfTypeAll<ScriptableObject>().Where(x => x is ILoadable).ToArray();
+			var assets = EditorStorage.GetAllAssetsOfType<ScriptableObject>();
+			var loadables = assets.Where(x => x is ILoadable).ToArray();
+			var initializables = assets.Where(x => x is IInitializableBeforeBuild).Cast<IInitializableBeforeBuild>();
+
+			foreach (var initializable in initializables)
+				initializable.Init();
+
 			_loadables = new ScriptableObject[loadables.Length];
 
 			for (int i = 0; i < loadables.Length; i++)
 			{
 				var loadable = loadables[i];
 				var copy = Object.Instantiate(loadable);
-				var path = $"Assets/Resources/{loadable.name}.asset";
+				string path = $"Assets/Resources/{loadable.name}.asset";
 
 				AssetDatabase.CreateAsset(copy, path);
 				_loadables[i] = copy;

Runtime/ILoadable.cs.meta

@@ -1,3 +1,14 @@
 {
-	"name": "com.intothedev.loader"
-}
+    "name": "com.intothedev.loader",
+    "rootNamespace": "",
+    "references": [],
+    "includePlatforms": [],
+    "excludePlatforms": [],
+    "allowUnsafeCode": false,
+    "overrideReferences": false,
+    "precompiledReferences": [],
+    "autoReferenced": true,
+    "defineConstraints": [],
+    "versionDefines": [],
+    "noEngineReferences": false
+}

Runtime/Storage.cs

@@ -1,6 +1,6 @@
 {
   "name": "com.intothedev.loader",
-  "version": "1.3.0",
+  "version": "1.4.0",
   "displayName": "ScriptableObject Loader",
   "description": "Load Scriptable Objects via code.",
   "author": {