diff --git a/packages/game-bridge/.eslintrc.cjs b/packages/game-bridge/.eslintrc.cjs
index 8b8a821f7e..72bea9abde 100644
--- a/packages/game-bridge/.eslintrc.cjs
+++ b/packages/game-bridge/.eslintrc.cjs
@@ -4,5 +4,6 @@ module.exports = {
   "parserOptions": {
     "project": "./tsconfig.json",
     "tsconfigRootDir": __dirname
-  }
+  },
+  "ignorePatterns": ["scripts/**"]
 }
diff --git a/packages/game-bridge/.parcelrc b/packages/game-bridge/.parcelrc
new file mode 100644
index 0000000000..b2f87351d6
--- /dev/null
+++ b/packages/game-bridge/.parcelrc
@@ -0,0 +1,4 @@
+{
+  "extends": "@parcel/config-default",
+  "bundler": "@parcel/bundler-default"
+}
diff --git a/packages/game-bridge/package.json b/packages/game-bridge/package.json
index 1f42651bd0..6ca0945683 100644
--- a/packages/game-bridge/package.json
+++ b/packages/game-bridge/package.json
@@ -10,12 +10,14 @@
     "ethers": "^6.13.4"
   },
   "devDependencies": {
+    "@parcel/bundler-default": "^2.16.3",
+    "@parcel/config-default": "^2.16.3",
     "eslint": "^8.40.0",
     "parcel": "^2.13.3"
   },
   "scripts": {
-    "build": "parcel build --no-cache --no-scope-hoist",
-    "build:local": "parcel build --no-cache --no-scope-hoist && pnpm updateSdkVersion",
+    "build": "parcel build --no-cache --no-scope-hoist && node scripts/fixUnityBuild.js",
+    "build:local": "parcel build --no-cache --no-scope-hoist && node scripts/fixUnityBuild.js && pnpm updateSdkVersion",
     "lint": "eslint ./src --ext .ts,.jsx,.tsx --max-warnings=0",
     "start": "parcel",
     "updateSdkVersion": "./scripts/updateSdkVersion.sh"
@@ -25,6 +27,9 @@
     "unity": {
       "context": "browser",
       "source": "src/index.html",
+      "outputFormat": "global",
+      "scopeHoist": false,
+      "isLibrary": false,
       "engines": {
         "browsers": "Chrome 90"
       }
@@ -33,6 +38,8 @@
       "outputFormat": "global",
       "context": "browser",
       "source": "src/index.ts",
+      "scopeHoist": false,
+      "isLibrary": false,
       "engines": {
         "browsers": "Chrome 90"
       }
diff --git a/packages/game-bridge/scripts/fixUnityBuild.js b/packages/game-bridge/scripts/fixUnityBuild.js
new file mode 100644
index 0000000000..85225924d6
--- /dev/null
+++ b/packages/game-bridge/scripts/fixUnityBuild.js
@@ -0,0 +1,84 @@
+#!/usr/bin/env node
+/* eslint-disable */
+/**
+ * Post-build script to fix the Unity HTML bundle.
+ * 
+ * ROOT CAUSE:
+ * viem uses dynamic import() for lazy-loading CCIP (Cross-Chain Interoperability Protocol) code:
+ *   const { offchainLookup } = await import('../../utils/ccip.js');
+ * (see: viem/_esm/actions/public/call.js line 126)
+ * 
+ * When Parcel builds the HTML target with <script type="module">, it:
+ * 1. Creates a separate ccip.*.js chunk for the dynamic import
+ * 2. Uses absolute paths in script src (e.g., /game-bridge.*.js) which don't work offline
+ * 
+ * Parcel's bundler configuration (minBundles, manualSharedBundles) only affects *shared* bundles
+ * between multiple entry points, NOT async bundles from dynamic imports.
+ * 
+ * WORKAROUND:
+ * This script inlines all external JS files into the HTML to create a self-contained bundle.
+ * This ensures the Unity embedded browser (which runs offline) can load everything.
+ */
+
+const fs = require('fs');
+const path = require('path');
+
+const UNITY_DIST_DIR = path.join(__dirname, '..', 'dist', 'unity');
+const HTML_FILE = path.join(UNITY_DIST_DIR, 'index.html');
+
+console.log('Fixing Unity build...');
+
+// Read all JS files in the dist directory (sorted so main bundle comes first)
+const jsFiles = fs.readdirSync(UNITY_DIST_DIR)
+  .filter(f => f.endsWith('.js') && !f.endsWith('.map'))
+  .sort((a, b) => {
+    // Main bundle should be first
+    if (a.startsWith('game-bridge')) return -1;
+    if (b.startsWith('game-bridge')) return 1;
+    return a.localeCompare(b);
+  });
+
+console.log(`Found ${jsFiles.length} JS file(s):`, jsFiles);
+
+// Combine all JS files
+let combinedJs = '';
+for (const jsFile of jsFiles) {
+  const jsPath = path.join(UNITY_DIST_DIR, jsFile);
+  const jsContent = fs.readFileSync(jsPath, 'utf8');
+  combinedJs += jsContent + '\n';
+  console.log(`  - ${jsFile}: ${jsContent.length} bytes`);
+}
+
+// Create a self-contained HTML file
+const html = `<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+    <title>GameSDK Bridge</title>
+    <script>${combinedJs}</script>
+</head>
+<body>
+</body>
+</html>`;
+
+// Write the fixed HTML
+fs.writeFileSync(HTML_FILE, html, 'utf8');
+
+console.log('Unity build fixed successfully!');
+console.log(`Output: ${HTML_FILE} (${html.length} bytes)`);
+
+// Clean up JS files (now inlined)
+for (const jsFile of jsFiles) {
+  const jsPath = path.join(UNITY_DIST_DIR, jsFile);
+  fs.unlinkSync(jsPath);
+  console.log(`Removed ${jsFile}`);
+  
+  // Also remove the map file if it exists
+  const mapPath = jsPath + '.map';
+  if (fs.existsSync(mapPath)) {
+    fs.unlinkSync(mapPath);
+    console.log(`Removed ${jsFile}.map`);
+  }
+}
+
+console.log('Done!');
diff --git a/packages/game-bridge/src/index.html b/packages/game-bridge/src/index.html
index 1104ae175e..6df5930d4d 100644
--- a/packages/game-bridge/src/index.html
+++ b/packages/game-bridge/src/index.html
@@ -4,13 +4,10 @@
 <head>
     <meta charset="utf-8">
     <title>GameSDK Bridge</title>
-    <script type="module">
-        import "./index.ts";
-    </script>
+    <script type="module" src="./index.ts"></script>
 </head>
 
 <body>
-    <h1>Bridge Running</h1>
 </body>
 
 </html>
\ No newline at end of file