diff --git a/ignore_instance.json b/ignore_instance.json
new file mode 100644
index 0000000..2cf79f9
--- /dev/null
+++ b/ignore_instance.json
@@ -0,0 +1,8 @@
+{
+  "core_identifiers": [
+    "Mazamars312.NeoGeo",
+    "Mazamars312.NeoGeo_Overdrive",
+    "Mazamars312.NeoGeo_Analogizer",
+    "obsidian.Vectrex"
+  ]
+}