diff --git a/.github/html5validator.yml b/.github/html5validator.yml
new file mode 100644
index 0000000..635b195
--- /dev/null
+++ b/.github/html5validator.yml
@@ -0,0 +1,5 @@
+root: ./
+ignore_re:
+  - 'An "img" element must have an "alt" attribute, except under certain conditions'
+  - 'Element "div" not allowed as child of element "label" in this context'
+  - 'The "center" element is obsolete. Use CSS instead' # initialdzero
diff --git a/.github/workflows/html.yml b/.github/workflows/html.yml
new file mode 100644
index 0000000..e17df3b
--- /dev/null
+++ b/.github/workflows/html.yml
@@ -0,0 +1,16 @@
+name: HTML Check
+
+on:
+  pull_request:
+  push:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - name: HTML5 Validator
+      uses: Cyb3r-Jak3/html5validator-action@v7.2.0
+      with:
+        config: ./.github/html5validator.yml
+        css: true
diff --git a/index.html b/index.html
index 6b33597..1972e27 100644
--- a/index.html
+++ b/index.html
@@ -230,7 +230,6 @@
                     <img src="img/gfdmxg2.png">
                     <div>GuitarFreaks & DrumMania XG2</div>
                 </a>
-                </a>
                 <a href="gfdmxg3.html" class="gameicon">
                     <img src="img/gfdmxg3.png">
                     <div>GuitarFreaks & DrumMania XG3</div>
@@ -441,6 +440,7 @@
                 <a href="sdvx2.html" class="gameicon">
                     <img src="img/sdvx2.png">
                     <div>SDVX II INFINITE INFECTION</div>
+                </a>
                 <a href="sdvx3.html" class="gameicon">
                     <img src="img/sdvx.png">
                     <div>SDVX III GRAVITY WARS</div>