Add Nanpi surrender scenario

data/campaign/campaign.json

@@ -98,6 +98,11 @@
       "id": "019_nanpi_pressure",
       "title": "Nanpi Pressure",
       "path": "res://data/scenarios/019_nanpi_pressure.json"
+    },
+    {
+      "id": "020_nanpi_surrender",
+      "title": "Nanpi Surrender",
+      "path": "res://data/scenarios/020_nanpi_surrender.json"
     }
   ]
 }