diff --git a/tools/ci/unticked_files.py b/tools/ci/unticked_files.py
new file mode 100644
index 00000000000..528dd7777b9
--- /dev/null
+++ b/tools/ci/unticked_files.py
@@ -0,0 +1,48 @@
+# Naive search for unticked files. Has no semantic knowledge, just a lexical
+# search for #include directives against existing file paths.
+#
+# Usage:
+#  python unticked_files.py C:\Path\To\Paradise\
+#
+# Returns 0 if all existing files are considered ticked, 1 otherwise.
+
+from pathlib import Path
+import argparse
+import sys
+
+INCLUDER_FILES = [
+    'paradise.dme',
+    'code/modules/tgs/includes.dm',
+    'code/modules/unit_tests/_unit_tests.dm',
+]
+
+IGNORE_FILES = {
+    # Included directly in the function /datum/tgs_api/v5#ApiVersion
+    'code/modules/tgs/v5/interop_version.dm'
+}
+
+def get_unticked_files(root:Path):
+    ticked_files = set()
+    for includer in INCLUDER_FILES:
+        with open(root / includer, 'r') as f:
+            lines = [line for line in f.readlines() if line.startswith('#include')]
+            included = [line.replace('#include ', '').rstrip('\r\n').strip('"') for line in lines]
+            print(f'Found {len(included)} includes in {root / includer}')
+            ticked_files.update([root / Path(includer).parent / i for i in included])
+
+    all_dm_files = {f for f in root.glob('**/*.dm')}
+    return all_dm_files - ticked_files - {root / f for f in IGNORE_FILES}
+
+if __name__ == '__main__':
+    parser = argparse.ArgumentParser()
+    parser.add_argument("root", help="paracode root directory")
+    args = parser.parse_args()
+
+    # Windows quoting behavior for directories adds trailing double-quote
+    unticked_files = get_unticked_files(Path(args.root.strip('"')))
+    if unticked_files:
+        print(f'Found {len(unticked_files)} unticked files:')
+        print('\n'.join(str(x) for x in sorted(unticked_files)))
+        sys.exit(1)
+    else:
+        print(f'Found no unticked files')