Deus Ex 4th Mission: Hell's Kitchen (Second Visit) and NSF Headquarters

The fourth mission in Deus Ex begins at the UNATCO Headquarters and features a return to Hell's Kitchen and a visit to the NSF Headquarters, a location in Hell's Kitchen that is exclusive to this mission. In this mission, JC Denton defects from UNATCO and becomes part of the resistance against Majestic 12.

Goals
* Given by Janice Reed

Augmentation canisters

 * UNATCO Headquarters
 * Speed Enhancement / Run Silent (appearance #2) – locked storage closet in the medical bay. This is the second instance of this canister, which previously appeared in the NSF warehouse in the second mission.
 * Hell's Kitchen
 * Augmentation upgrade canister – In the secret area in Paul Denton's apartment, accessed by a keypad (code: 4321) behind the painting

Weapon modifications

 * UNATCO Headquarters
 * Reload – In restroom in Manderley's office
 * Recoil – Under the desk in JC Denton's office
 * Hell's Kitchen
 * Accuracy – In the 'Ton Hotel, on the third-floor ledge of the elevator shaft
 * Range – Sold by Smuggler (2400 credits)
 * Clip – Sold by Smuggler (1500 credits)
 * Clip – In Smuggler's living quarters, behind the mirror near the bed
 * Recoil – Same location as the above
 * Hell's Kitchen - 20th Street Warehouse (NSF Headquarters)
 * Accuracy – In the basement, inside the cabinet on which the datacube with the login information is found

UNATCO Headquarters (third visit)
Visit Joseph Manderley for a debriefing of the previous mission. If you killed Lebedev, Manderley will commend you on a flawless performance. If you killed Anna Navarre, Manderley will suspect that you are trying to cover up for your brother. If you Anna killed Lebedev, Manderley will scold you for disobeying his direct orders. In any event, Manderley will tell you that UNATCO has shut down Paul's augmentations and activated his killswitch. He then assigns you go to to Hong Kong to assassinate Tracer Tong, Paul's contact in Hong Kong.

Janice Reed will also provide a side goal for you to locate Jaime Reyes. Jaime Reyes is speaking with Walton Simmons in the break room. Speak to Walton for some interesting dialogue hinting at his involving with the conspiracy.

Prior to leaving for Hong Kong, you may wish to search the headquarters for any loot that may be useful, and speak to the other others, such as Alex Jacobson, and Sam Carter for further dialogue. The locked storage closet in the medical bay has the canister for leg augmentation, if you did not pick it up at the warehouse in the second mission.

Hell's Kitchen (second visit)
Once you get on Jock's helicopter, Jock reveals that he is also part of the resistance and diverts you to Hell's Kitchen to help your brother at the 'Ton Hotel. Speak to Paul, who will tell you more about the conspiracy and send you to the NSF headquarters to transmit a distress signal to NSF allies such as Silhouette. While in Paul's apartment, open his secret closet using the keypad (4321) hidden behind the painting. The secret closet includes an augmentation upgrade canister and other useful items.

During this mission, you can explore Hell's Kitchen for the second time.
 * In the lobby of the 'Ton Hotel, talk to Gilbert and Sandra Renton about their problem with local thug JoJo Fine.
 * Gilbert will ask for a weapon to defend himself and his daughter against JoJo. You may give him a pistol, stealth pistol, sawed-off shotgun, combat knife, or mini-crossbow. The dialogue options only permit you to choose between giving one of the above weapons (if available, in the order above) or none at all. You may drop a weapon in order to get the dialogue options to show the particular weapon that you want to give.
 * JoJo then arrives for a confrontation.
 * If you gave Gilbert a weapon and he kills or at least wounds JoJo, Sandra will stay with her father.
 * Otherwise, Sandra, if she is still alive, will leave New York.
 * The Underworld Tavern is still open. Joe Greene and Harley Filben will tell you that a UNATCO raid is imminent.
 * Smuggler's Lair can be visited again for bonus skill points. Smuggler will have another set of items for sale, although due to a bug, the prices will remain high even if you saved Ford Schick in the last visit to Hell's Kitchen.
 * The sewers can be visited for bonus skill points. Use the entrance near the 'Ton Hotel.

NSF Headquarters
The NSF Headquarters is accessible by the road near the tavern and has been occupied by UNATCO troops. Once you are on site, Paul will provide instructions on how to find a datacube in the basement for the login for rooftop computer. While visiting the basement is optional, doing so will provide bonus skill points. Go to the third level and find a security terminal that opens a hatch in the garage. Open the hatch and proceed down to the basement, where you will need to traverse a series of traps to reach an electronics-filled room with the datacube, above a locked cabinet with various loot.

Once you've obtained the login information (mcollins/revolution), head to the roof of the facility. Use the first computer to align the satellite dishes (by click on each of the three buttons). Then, use the second computer to send the distress message. Realizing that you've defected, Walton Simons will then order the UNATCO troops against you. Note that this facility includes a medbot as well as a repair bot, which are useful for preparing for the next phase of the mission.

Return to Paul and escape to Battery Park
Upon speaking to Paul again, you learn that the hotel is being raided by UNATCO troops supported by Men in Black. Paul urges you to escape via the bedroom window, but if you escape via the window, Paul will later die off-screen. Therefore, if you wish Paul to survive through the remainder of the story, do not leave the apartment via the window; instead, help Paul fight off the assault and leave the hotel through its main entrance. Despite having his augmentations deactivated and claiming to be unable to climb to the roof, Paul remains invincible during actual gameplay, and can take on any number of enemies without being in danger.

Use the keypad code provided by Paul (6282) to unlock the entrance to the subway station. Take the subway to Battery Park, where you will encounter Anna Navarre (unless she was killed in the last mission). Anna can be killed here. However, Gunther Hermann, who is waiting outside the subway station, cannot be killed. The game will transition to the next mission if you surrender to Gunther or go down fighting against Anna, Gunther, or the UNATCO troops outside.

Note that the game will transition to the next mission if you die at any point during the UNATCO raid. However, you are awarded skill points for reaching Hell's Kitchen subway station and additional skill points for exiting the Battery Park subway station.

Trivia

 * According to Deus Ex design documents, this mission was originally named "M04: Brother in Peril"