Batman: Arkham Asylum/Walkthrough/0001 - Rescue Commissioner Gordon

Rescue Commissioner Gordon is the first primary objective in Batman: Arkham Asylum.

Plot
Regaining consciousness, one of the guards in Secure Treatment calls Batman over to the control room he took refuge in. At Batman's demand, the guard explains that the door leads to an area called "Extreme Isolation", which can only be accessed through the transport system. The guard tries to open it, but finds the security loop to be locked. Joker sends Batman a taunting video message, as well as a warning: Commissioner Gordon has been kidnapped by corrupt guard Frank Boles and delivered to Harley Quinn. Harley will kill Gordon if Joker catches Batman trying to follow him. Putting his hunt for Joker on hold, Batman returns to the Holding Cells to look for a way to track Boles.

Escaping Intensive Treatment
Finding Boles's discarded flask, Batman creates a vapor trail using the bourbon inside. He follows the trail to the elevators, where he is interrupted by Harley Quinn. Quinn tells that Joker doesn't want Batman following them just yet, and triggers an explosive, sending her to the upper levels and the elevator crashing down. With the elevator out, Batman is forced to climb up top through the vents, during which he overhears Boles massacring unsuspecting guards via the radio.

Once on the upper levels, Batman discovers that the Blackgate prisoners have stolen guns from the guards, and is forced to watch in the shadows as two unarmed guards meet a gruesome end. He manages to knock out the four thugs in the vicinity before neutralizing the ones in the lobby. However, having deduced how the Caped Crusader was tracking Gordon, Joker has had Officer Boles killed: the corrupt guard's body is waiting at the only exit, which is locked off.

Soon after discovering Boles's corpse, Batman is contacted by the Riddler, who has Batman solve one of his riddles and insists on him solving all the challenges scattered throughout the asylum. Once this is completed, Batman locates an alternate route out of Intensive Treatment, making his way to the eastern section of Arkham Island.

Tracking Gordon
Joker announces over the intercoms that the Batmobile is still outside Intensive Treatment, and orders any available henchman to smash it, to keep Batman from leaving Arkham. Knowing that Harley Quinn might bring Gordon nearby the Batmobile, Batman orders Oracle to disable the Batmobile's defenses so that they won't hurt Gordon by mistake. After reaching Arkham North and defeating the thugs smashing the Batmobile, Batman grabs the Explosive Gel from the trunk.

Noticing that there was a scuffle, Batman searches the area and finds Gordon's pipe. Realizing that Gordon purposefully left the pipe behind, Batman follows the trail to the Medical Facility in Arkham West, both of which have been completely taken over by Joker's men. While the main entrance to the Medical building is blocked off by security gates, Batman locates an alternate entrance and makes his way inside.

Medical Facility
Over the intercoms, Batman hears Joker ordering his thugs to locate all of the doctors and keep them inside the building. He saves a group of doctors from Joker's men in the Sanatorium, who inform that there are three doctors not present. Batman orders them to stay put while he finds the other doctors.

Batman finds and rescues Dr. Chen in the Surgery room, Dr. Kellerman in Patient Observation (as well as Officer Aaron Cash, who was trapped in the room with Kellerman), and Dr. Young in X-Ray. When he returns to the Sanatorium, Dr. Young insists on retrieving her research notes from the Arkham Mansion. With more thugs incoming from the lower level, Batman reluctantly allows Dr. Young to leave with Officer Cash and has the remaining doctors barricade themselves in Patient Observation. After dealing with the thugs, Batman takes the elevator to the lower level to continue searching for Gordon.

Upon reaching the lower level, Batman witnesses a number of Arkham staff and patients fall victim to psychedelic fear gas created by Jonathan Crane, aka "Scarecrow". Having been exposed to Scarecrow's gas in the elevator, Batman begins hallucinating, which escalates into a nightmarish dreamscape by the time he overcomes the toxin's effects.

Regaining his grip on reality, Batman resumes his search, finding a new twisted challenge from Joker waiting for him. Harley is guarding Gordon, and four thugs are patrolling the room. If any of them suspect Batman's presence, Harley will kill Gordon. Once Batman saves the Commissioner, Joker "rewards" him, directing him to a previously locked chamber in the center of the room. Inside, Batman and Gordon find a restrained and shriveled Bane, who was believed to have escaped from Blackgate. The weakened Bane reveals that Dr. Young (whom he labels "the bruja") drained him of his strength-enhancing Venom, but is suddenly re-injected remotely by Joker. The revitalized Bane breaks free and attacks Batman, tossing him into the Medical Facility's Boiler Room. The ensuing fight damages the room: Batman escapes as the ceiling collapses, with Bane seemingly being trapped under debris.

Batman meets Gordon on the island's surface, who tells him that Harley escaped during the fight. They are interrupted by Bane breaking free of the rubble. Bane attempts to finish off Batman, but the Dark Knight uses the remotely operated Batmobile to launch Bane into the Gotham Bay. Batman instructs Gordon to leave Arkham Island, knowing he's needed in Gotham to handle Joker's bomb threat. As Gordon departs via a police boat, he asks Batman what Bane meant by "bruja". Batman replies that the word is Spanish for "witch".

Walkthrough
After Joker escapes behind the door, wait for the guard on the left to lower power to the control room. Speak to him, and the cutscene will begin a few seconds later.

Scan the crime scene area to isolate a forensic trail.
Boles's flask of bourbon is in the far right corner of the room. Once it is locked on, simply scan it. Once the trail is generated, the Detective Mode filter will turn purple.

Locate and save the missing doctors.
The three doctors can be saved in any order:

Rescue Gordon without being detected.
There are a total of four thugs on the lower level, each of which must be incapacitated without alerting the others. There is an order in which to safely take them out.

The first thug is located nearby the grate exit.

Trophies

 * Just What The Doctors Ordered: Save all the doctors in medical (Secret)
 * Daydreamer: Survive the nightmare of the Scarecrow's fear gas (Secret)
 * Baneful Payback: Defeat Bane (Secret)

Trivia

 * The Scarecrow encounter is listed here as a separate entity, but is not an objective. However, during the hallucination, Batman's primary objective will change to "Hunt Commissioner Gordon's Killer."