Batman Arkham Asylum Episode 3: Medical Facility

"Batman leaves Intensive Treatment, finding his way to Arkham East, where he discovers that the Batmobile is being attacked by Harley Quinn's henchmen."
"Entering the Medical Facility, he encounters Harley and Gordon but cannot reach them due to one of the security fields, thus forcing him to find a different point of entry through the Maintenance Access on the roof."