diff --git a/cat3d.html b/cat3d.html
new file mode 100644
index 0000000..0a633fd
--- /dev/null
+++ b/cat3d.html
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+<!doctype html>
+<html lang="en">
+
+<head>
+  <meta charset="utf-8">
+  <title>Catacombs 3D</title>
+  <script src="https://js-dos.com/6.22/current/js-dos.js"></script>
+  <style>
+    html, body, canvas, .dosbox-container {
+      width: 100%;
+      height: 100%;
+      margin: 0;
+      padding: 0;
+    }
+  </style>
+</head>
+
+<body>
+  <canvas id="jsdos"></canvas>
+  <button style="position: absolute; right: 1em; top: 1em;" onclick="ci.fullscreen()">FS</button>
+
+<script>
+    Dos(document.getElementById("jsdos"), { 
+      wdosboxUrl: "https://js-dos.com/6.22/current/wdosbox.js",
+      cycles: "auto",
+      autolock: true,
+    }).ready(function (fs, main) {
+      fs.extract("https://dl.dropbox.com/s/8wssdntymrmhawa/cat3d.zip").then(function () {
+        main(["-c", "cat3d"]).then(function (ci) {
+          window.ci = ci;
+        });
+      });
+    });
+  </script>
+</body>
+
+</html>
