diff --git a/astro.config.mjs b/astro.config.mjs
index e81a3e3..e2231fe 100644
--- a/astro.config.mjs
+++ b/astro.config.mjs
@@ -123,7 +123,13 @@ export default defineConfig({
             },
             {
               label: "World at War (T4)",
-              items: [{ label: "Bot Warfare", slug: "guides/t4/bot-warfare" }],
+              items: [
+                { label: "Bot Warfare", slug: "guides/t4/bot-warfare" },
+                {
+                  label: "Custom Zombie Maps & Fastfiles",
+                  slug: "guides/t4/fastfiles",
+                },
+              ],
             },
           ],
         },
diff --git a/public/og/t4-fastfiles-zombie-maps.webp b/public/og/t4-fastfiles-zombie-maps.webp
new file mode 100644
index 0000000..8fe1875
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diff --git a/src/assets/t4_fastfiles/splitscreen-zombie-maps.webp b/src/assets/t4_fastfiles/splitscreen-zombie-maps.webp
new file mode 100644
index 0000000..50f4eea
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diff --git a/src/content/docs/guides/t4/fastfiles.mdx b/src/content/docs/guides/t4/fastfiles.mdx
new file mode 100644
index 0000000..df9874c
--- /dev/null
+++ b/src/content/docs/guides/t4/fastfiles.mdx
@@ -0,0 +1,150 @@
+---
+title: "World at War Custom Zombie Maps"
+description: Install six custom zombie maps for World at War on Xbox 360 or Xenia.
+head:
+  - tag: meta
+    attrs:
+      property: og:image
+      content: https://codxenon.dev/og/t4-fastfiles-zombie-maps.webp
+  - tag: meta
+    attrs:
+      property: og:image:type
+      content: image/webp
+  - tag: meta
+    attrs:
+      property: og:image:width
+      content: "1200"
+  - tag: meta
+    attrs:
+      property: og:image:height
+      content: "630"
+  - tag: meta
+    attrs:
+      property: og:image:alt
+      content: A custom zombie map running in World at War through CoD Xe
+  - tag: meta
+    attrs:
+      name: twitter:card
+      content: summary_large_image
+  - tag: meta
+    attrs:
+      name: twitter:image
+      content: https://codxenon.dev/og/t4-fastfiles-zombie-maps.webp
+  - tag: meta
+    attrs:
+      name: twitter:image:alt
+      content: A custom zombie map running in World at War through CoD Xe
+---
+
+import {
+  Aside,
+  CardGrid,
+  FileTree,
+  LinkButton,
+  LinkCard,
+} from "@astrojs/starlight/components";
+
+This package contains the CoD Xe fastfiles needed to play six custom zombie
+maps in Call of Duty: World at War.
+
+![A custom zombie map running in World at War through CoD Xe](/og/t4-fastfiles-zombie-maps.webp)
+
+<Aside type="caution" title="Public prerelease">
+  Version **0.1.0** is an early public release. You may encounter visual issues,
+  gameplay issues, performance drops, or crashes.
+</Aside>
+
+## Known Issues
+
+- Some map sounds are currently missing.
+- The custom maps do not currently have loading screens.
+
+:::note[Map credits]
+All credit and respect goes to the original creators of the included custom
+zombie maps.
+:::
+
+## Included Custom Zombie Maps
+
+- **Mario** (`mario`)
+- **Aztec** (`nazi_zombie_aztec`)
+- **Cheese Cube** (`nazi_zombie_ccube_u`)
+- **Halloween** (`nazi_zombie_halloween`)
+- **Hijacked** (`nazi_zombie_hijacked`)
+- **SpongeBob** (`spongebob`)
+
+## What You Need
+
+- A **genuine USA / Europe copy** of Call of Duty: World at War
+- Call of Duty: World at War **TU7**
+- The latest **CoD Xe** plugin
+
+Prepare a clean game folder and install CoD Xe before continuing:
+
+<CardGrid>
+  <LinkCard
+    title="Prepare game files"
+    href="/guides/prepare-game-files/"
+    description="Use clean, unmodified game files."
+  />
+  <LinkCard
+    title="Install World at War TU7"
+    href="/reference/supported-games/"
+    description="Download TU7 and install it for your platform."
+  />
+  <LinkCard
+    title="Xbox 360"
+    href="/guides/codxe/xbox-360/"
+    description="Install CoD Xe on an Xbox 360."
+  />
+  <LinkCard
+    title="Xenia"
+    href="/guides/codxe/xenia/"
+    description="Install CoD Xe on Xenia Canary."
+  />
+</CardGrid>
+
+## Download and Install
+
+<LinkButton
+  href="https://downloads.codxenon.dev/codxe-t4-fastfiles-v0.1.0.zip"
+  download
+  icon="download"
+>
+  Download **CoD Xe T4 Fastfiles v0.1.0**
+</LinkButton>
+
+1. Extract the `.zip`.
+2. Open the extracted `codxe-t4-fastfiles-v0.1.0` folder.
+3. Copy its `_codxe` folder into your World at War game folder and allow it to
+   merge with your existing `_codxe` folder.
+
+Do **not** delete or replace your existing `_codxe` folder.
+
+When installed correctly, the relevant files should look like this:
+
+<FileTree>
+
+- `Call of Duty - World at War`
+  - \_codxe
+    - zone
+      - **patch.ff**
+      - **patch_ui.ff**
+    - usermaps
+      - mario
+        - mario.ff
+      - nazi_zombie_aztec
+        - nazi_zombie_aztec.ff
+      - nazi_zombie_ccube_u
+        - nazi_zombie_ccube_u.ff
+      - ...
+  - default_mp.xex
+  - ...
+
+</FileTree>
+
+## Split Screen
+
+All six included maps support local Split Screen.
+
+![Two players using Split Screen on the Mario custom zombie map](../../../../assets/t4_fastfiles/splitscreen-zombie-maps.webp)
diff --git a/src/content/docs/reference/supported-games.mdx b/src/content/docs/reference/supported-games.mdx
index ddbc663..1f05f31 100644
--- a/src/content/docs/reference/supported-games.mdx
+++ b/src/content/docs/reference/supported-games.mdx
@@ -47,4 +47,5 @@ listed 007: Quantum of Solace release includes English and French.
 - [Modern Warfare 2 Bot Warfare](/guides/iw4/bot-warfare/)
 - [Modern Warfare 2 Fastfiles](/guides/iw4/fastfiles/)
 - [World at War Bot Warfare](/guides/t4/bot-warfare/)
+- [World at War Custom Zombie Maps](/guides/t4/fastfiles/)
 - [Modern Warfare 3 Bot Warfare](/guides/iw5/bot-warfare/)