History DevelopersForesight / DeusEx

* Security bots, despite having enough ammo to kill you ten times over, will eventually run out of bullets and then run for cover.

** When you are about to arrest Lebedev, Anna storms in and orders you to kill him. If you decide to kill her instead of Lebedev, you get an entirely new cutscene, where Lebedev informs JC that his parents were lab technicians, Alex will delete the audio transcripts of the prior few minutes and JC ends up lying to Gunther to cover his whereabouts during the shooting. If you booby trap the entrance with LAMs to kill her as soon as she enters, JC will tell Manderley that Juan had booby-trapped the room. The fact that nothing in the game clues you in to this makes it all the more shocking when it actually ''works''. Killing Anna also impacts the rest of the game: when you're captured by the conveniently invincible Gunther Hermann, he gives you a special message about making you pay for her death after you escape confinement. Also, Navarre stays dead for the rest of the game, meaning the boss battle is skipped.

** When you are about to arrest Lebedev, Anna storms in and orders you to kill him. If you decide to kill her instead of Lebedev, you get an entirely new cutscene, where Lebedev informs JC that his parents were lab technicians, Alex will delete the audio transcripts of the prior few minutes and JC ends up lying to Gunther to cover his whereabouts during the shooting. The fact that nothing in the game clues you in to this makes it all the more shocking when it actually ''works''. Killing Anna also impacts the rest of the game: when you're captured by the conveniently invincible Gunther Hermann, he gives you a special message about making you pay for her death after you escape confinement. Also, Navarre stays dead for the rest of the game, meaning the boss battle is skipped.

** All of the UNATCO troopers deployed on the island once Leo Gold is captured/killed are invulnerable ... ''except'' for the one walking up the stairs at the top of the statue. Taking him down nets you a free assault rifle early, and it also explains why assault rifle ammo can be picked up in Battery Park (you normally don't get an assault rifle until you reach Hell's Kitchen).
Manderley also has alternate dialogue based on whether the player knocked out or killed the soldier in the briefing afterwards.

** All of the NSF troopers deployed on the island once Leo Gold is captured/killed are invulnerable ... ''except'' for the one walking up the stairs at the top of the statue. Taking him down nets you a free assault rifle early, and it also explains why assault rifle ammo can be picked up in Battery Park (you normally don't get an assault rifle until you reach Hell's Kitchen). Manderley also has alternate dialogue based on whether the player knocked out or killed the soldier in the briefing afterwards.

** Alternatively, you can do El Rey's quest to kill a rival drug dealer. If you should decide to just knock out the dealer instead, El Rey will complain about it before giving you the LAM anyway, while JC stresses that he used "the minimum amount of necessary force".

* You can choose to retrieve the neuroplasticity calibrator for Koller from Otar Botkeveli's casino ''before'' you're asked to. Doing so causes an entirely different cutscene (and an achievement, to boot!). Koller is gobsmacked when Adam reveals he has the calibrator, but says that he's not ready to dive in just yet. He also tells Adam to contact Sarif, and says that he's going to do some research before installing it. It should be noted that doing this also makes the mission chain involving Otar's errands unavailable, making this sequence more of a curiosity for enterprising players. So if you're trying to get most of all achievements in one playthrough, it's best to make a save before deciding to do this.

* It's possible to revisit Ruzicka Station during your second and third visits to Prague, despite the fact that isn't clear that you can go back again (the station was previously swarming with cops the last time it was visited). If you do so, however, you can find a memorial and a way to get back into the station to retrieve the ebook if you missed it the last time around.

** If you kill the caretaker before talking to Dowd in the crypt, he will comment on how Properly Paranoid JC has become.

** The doorman at the hostel near Club L'Enfer will have slightly different dialogue if you wait to talk with him for the first time until after you've talked to Nicolette and asked her to wait by the helicopter. Instead of asking about Nicolette directly, JC's line is changed so that he asks for more general information on Silhouette as a group.

** All of the NSF troopers deployed on the island once Leo Gold is captured/killed are invulnerable ... ''except'' for the one walking up the stairs at the top of the statue. Taking him down nets you a free assault rifle early, and it also explains why assault rifle ammo can be picked up in Battery Park (you normally don't get assault rifles normally until you reach Hell's Kitchen). Manderley also has alternate dialogue based on whether the player knocked out or killed the soldier in the briefing afterwards.
** If you finish the Statue of Liberty mission without visiting Harley Filben first, then go back to talk with him after you detain Leo Gold, Filben asks why he stood around for an hour if no one wanted to talk to him, while JC tells him he found a back door into the statue. Filben then insists that he wants extra pay, and JC tells him to take it up with Manderley.

** All of the NSF troopers deployed on the island once Leo Gold is captured/killed are invulnerable ... ''except'' for the one walking up the stairs at the top of the statue. Killing him nets you a free assault rifle early, and it also explains why assault rifle ammo can be picked up in Battery Park (you normally don't get assault rifles normally until you reach Hell's Kitchen).

** If you kill the NSF commander (via discovering his secret room) in the abandoned subway tunnels before doing anything else, JC has additional dialogue with a young boy if you haven't talked to him yet. The boy tells JC the secret of how to access the room, and JC then tells him not to go near it because it's "not too pretty in there".

** When you go perform the NSF transmitter mission for Paul, it's possible to kill all the friendly UNATCO troops in your way. Doing so will net you different dialogue after you activate the transmitter from Walton Simons, who says he always knew you were a traitor like your brother. If you do only non-lethal takedowns before you activate the transmitter, his dialogue changes very slightly to acknowledge this. ** Additionally, if you try to send the distress signal without rotating the satellite dish (which shouldn't be possible because the door to the console where you can activate the signal doesn't open until you rotate the dish), Paul tells you to go back to the other room and do it correctly.

* AIrfield:

The option to give Gunther Hermann your stealth pistol when you rescue him from captivity exists, despite the fact that you shouldn't be able to get one before you free him. It's possible to glitch the game so hard that you [[https://www.youtube.com/watch?v=SzmXviUwytA&list=PL7C71E6B445FEBE37 don't even talk to Gunther (and Paul) for the first time until you're back at UNATCO]], so you can get the stealth pistol off of Carter before your first conversation with him (which is forced to be his captivity dialogue until you leave for Battery Park). It's even possible to get dialogue for an assault gun if you use cheats to give yourself one (or kill the soldier mentioned below to acquire one early).

Alternatively, you can do El Rey's quest to kill a rival drug dealer. If you should decide to just knock out the dealer instead, El Rey will complain about it before giving you the LAM anyway, while JC stresses that he used "the minimum amount of necessary force".

** IShannon will admit to you that she's the one who's been stealing weapons and ammo from the armory if you go and see her in the break room of UNATCO HQ while you're breaking out of there after being captured by Agent Hermann or Agent Navarre. She'll also offer to sell you scrambler grenades. If you ''then'' go back to Sam Carter and talk to him, despite having no reason to go back there, JC will inform him who the armory thief was. Carter will then reveal there's more to the story than you know, and Shannon's gonna be facing an ugly surprise in the morning.

* There are many alternate conversations that occur if you do something (finishing a mission/killing someone) before you're asked to:
** If you finish the Statue of Liberty mission without visiting Harley Filben first, then go back to talk with him after you detain the head NSF terrorist, Filben asks why he stood around for an hour if no one wanted to talk to him, while JC tells him he found a back door into the statue. Filben then insists that he wants extra pay, and JC tells him to take it up with Manderley.

** The option to give Gunther Hermann your stealth pistol when you rescue him from captivity on Liberty Island exists, despite the fact that you shouldn't be able to get one before you free him. It's possible to [[https://www.youtube.com/watch?v=SzmXviUwytA&list=PL7C71E6B445FEBE37 glitch the game so hard that you don't even talk to Gunther (and Paul) for the first time until you're back at UNATCO]], so you can get the stealth pistol off of Carter before your first conversation with him (which is forced to be his captivity dialogue until you leave for Battery Park).
*** It's even possible to get dialogue for an assault gun if you use cheats to give yourself one (or mod the game so you can get one early).
** If you choose to handle the situation in the Battery Park subway station before clearing out Castle Clinton, Anna will have extra dialogue praising JC's abilities.
** You can get a special conversation with Filben later on if you kill [[spoiler:tabloid reporter/UNATCO spy Joe Greene]] before you're asked to. Likewise, Manderley chews you out for executing a civilian if you kill him during his first appearance at the Underworld Bar. Conversely, Manderley will chew out J.C. for speaking with him, telling him "Loose lips sink ships."
** Filben will also have special dialog if you first talk with him during the third Hell's Kitchen visit, having skipped his previous appearances.
** If you decide to [[SequenceBreaking glitch]] through the NYC sewer grate during the [=MJ12=] mission for Smuggler ''without'' going to see him first, when you get to the end, JC will ask Ford Schick about the identity of the soldiers, and not have any clue about Smuggler's task.

** When you go perform the [[spoiler:NSF]] transmitter mission for Paul in Hell's Kitchen, it's possible to kill all the [[spoiler:friendly UNATCO troops]] in your way. Doing so will net you different dialogue after you activate the transmitter from [[spoiler:Walton Simons]], who says he always knew you were a traitor like your brother. If you do only non-lethal takedowns before you activate the transmitter, he will congratulate you for your forethought. Additionally, if you try to send the distress signal without rotating the satellite dish, Paul tells you to go back to the other room and do it correctly.
** The dialogue with Walton Simons changes during the UNATCO escape if you kill Manderley before triggering his conversation (which is usually done by tossing a LAM or firing a rocket into the room before you enter). Simons brushes the death off and says Manderley was expendable, before commenting that it has no bearing on his plans.
** If you obtain the proof of Maggie Chow's guilt in the police station before visiting Gordon Quick (which shouldn't be possible because the player doesn't know the code to the station/vault unless they speak to her), JC will tell Quick that he already investigated the station and found what he needs, and Quick praises JC for having the guts to go through with such an act. The rest of the conversation takes a decidedly different tone as Quick tells JC to find the sword and stop Chow.
** If you kill Jordan Shea, the augmented bartender, before the superfreighter level, Vinny will chuckle, "Someone offed the bartender - drinks are free!"
** If you kill the [[spoiler:cemetery groundskeeper]] before you talk to Stanton Dowd, he will comment on how ProperlyParanoid you've become.
** If you take too long exploring the mansion in France, or poke around in unimportant areas, ICARUS will contact you and ask, "What are you looking for?"
** If you kill Howard Strong at the New West Coast Missile Silo before rescuing the scientist locked in the bathroom (which requires backtracking through the now pitch-black underground complex), a completely different conversation takes place where the scientist is surprised and impressed, and J.C. pledges to take down Page for good (giving him an interesting bit of characterization).
** During the final boss fight (which isn't really a "fight" so much as trying to survive the whole room trying to kill you), you can enter some ducts here and there. Coming out of a duct the same way you went in has Bob Page mock you. "Lost?"
* In the end of the tutorial level, it is possible to reach the observation window by stacking some boxes and climbing them. If you do it, you actually get complimented for it.
* The game will acknowledge the use of glitches. Throw a Gas Grenade at UNATCO's front door during the first level, then run past the guard that comes out. Once inside, a guard ''will actually acknowledge you skipped a bunch of terrorists that way''. The game continues normally as if you just finished the first level legitimately, but not before acknowledging your ingenuity.
** The guard states that you "snuck past" most of the terrorists, and his reaction is just based on the status of the enemies in the level. If you killed them all he will comment that you "cleaned house", and if you knocked them out but left them alive he will comment on that as well. By skipping the level, all of the enemies are still alive, so the game assumes that you snuck past them all.
* If [[http://www.it-he.org/deus3.htm you manage to shoot the seagulls]] that are flying just off the Liberty Island pier in the opening mission, Corporal Collins admonishes you with special dialogue ("I don't understand! What are you doing?").
* In the Statue of Liberty, [[spoiler:after detaining the head terrorist]], you can shoot or knock out the UNATCO soldier that's coming up. When reporting for debriefing, your boss asks you if you know what happened up there. Manderley knows whether or not you killed him, referring to his dead or unconscious body depending on how you took him down. Since you get an assault rifle for doing this without risking being killed by other soldiers, it explains why you can find ammo for it in the next mission (ordinarily, you won't get a rifle until the third mission).
* There's a sick man in Battery Park who begs you to kill him. If you try, he doesn't turn hostile and flee like most [=NPCs=]. (The police don't seem to care either, though that's less the dev team thinking of everything and more the dev team crafting a convincing dystopia.)
* If you somehow manage to get on the train near Castle Clinton without first resolving the hostage situation one way or the other (a feat that is supremely unlikely given that the hostages, the laser triggers for the explosives they're trapped with and all the terrorists are between you and the train), Paul will admonish you with special dialogue when you arrive in Hell's Kitchen.
* When you visit UNATCO after completing the mission in Hell's Kitchen (during Walton Simons' visit), you can watch the interrogation of the terrorists captured in Castle Clinton. You can go into the cell once the doors are open, watch the interrogation, and even execute or interrogate them by yourself. The interrogator ([[spoiler:Walton Simons]]) is not amused, and tells you so, as do [[MenInBlack his goons]]. Conversely, leave him alone, and said goons will thank you for being considerate of their boss.
* If you decide to kill all the Rooks ''except'' for El Rey in the abandoned subway station, leave him to run around until he becomes passive again and then talk to him, there is an alternate conversation where El Rey urges JC to be cool. JC subsequently threatens him and either tells him to go back to school (while receiving the LAM), or tells him he wants more (causing El Rey to throw the LAM at you and start running). If your inventory is full when you ask for the LAM, JC has a unique response where he chuckles and tells El Rey to wait a moment.
** Alternatively, you can do El Rey's quest to kill a rival drug dealer. If you should decide to just knock out the dealer instead, El Rey will complain about it before giving you the LAM anyway.
--->'''El Rey:''' You deaf? I said I want homeboy ''dead''.
--->'''JC:''' I used as much force as the situation required. Are you trying to lecture me on tactics?
** If you killed the drug dealer before speaking to El Rey, he's first surprised then pleased. JC comments he didn't like him in the first place.
* During the Airfield level, when you discover that [[spoiler: Paul is working for the NSF]], he asks you not to shoot any of the (now identified as friendly) unarmed NPC's standing around the plane. If you do, he chews you out for it.
** When you are about to [[spoiler:arrest Lebedev]], [[spoiler:Anna]] storms in and orders you to kill him. If you decide to [[spoiler:kill her instead of Lebedev]], you get an entirely new cutscene, where [[spoiler:Lebedev informs JC that his parents were lab technicians, Alex will delete the audio transcripts of the prior few minutes and JC ends up lying to Gunther to cover his whereabouts during the shooting]]. The fact that nothing in the game clues you in to this makes it all the more shocking when it actually ''works''. Killing [[spoiler:Anna]] also impacts the rest of the game: when you're captured by the [[StoryDrivenInvulnerability conveniently invincible]] Gunther Hermann, he gives you a special message [[spoiler:about making you pay for her death]] after you escape confinement. Also, [[spoiler:Navarre]] stays dead for the rest of the game, meaning the boss battle is skipped.
*** Alex will also give you a WhatTheHellHero, both on the infolink ''and'' when you return to him at HQ. JC will growl, "[[spoiler:Agent Navarre]] was ''out of line''."
*** If you choose to spare [[spoiler:Anna Navarre]] in the Battery Park Subway Station and during the UNATCO escape (the latter by using exploits), Gunther has alternate dialogue reflecting this fact when you're heading out of UNATCO's front door ("I regret that we only worked together once."), and has a different line if you chose not to give him a weapon during the first mission.
*** This also has another variation. Plant a LAM outside of the room you meet Lebedev, then listen in the background as she's blown to bits not long after Lebedev surrenders. By skipping the dialogue with [[spoiler:Anna]] before she orders you to kill Lebedev, the same events happen, but J.C. tells Walter that Lebedev booby-trapped the room, and Gunther will instead cotton on that you killed her later, as you are escaping UNATCO HQ.
* If the player goes to the Underworld Tavern or Smuggler's after escaping the raid on the 'Ton Hotel (despite having no reason to do so), the characters will have extra dialogue reacting to the raid and telling JC to get out of Hell's Kitchen immediately.
* In a moment of preventing the player from unintentionally getting stuck, while at the MJ12 helipad in Hong Kong, if you have the Aggressive Defense System augmentation, you can activate it and watch as the rockets Jock fires at the door will explode before impacting on it. However, the devs expected this and have Jock continually fire missiles every 3 seconds until the doors break, requiring that the player turn off ADS before continuing with the plot.
* If you kill Louis Pan when you get to Hong Kong, Gordon Quick will admonish you for the act using special dialogue. Evidently, the programmers expected that gamers would be so fed up with Pan's annoying statements that they would shoot him. Alternately, if you knock out Pan instead of killing him, Quick will say the same dialogue ''except'' for the line, "He was a good earner," which becomes, "He '''is''' a good earner."
* Normally, Maggie Chow disappears on your second visit to her penthouse (after you've found the evidence implicating her in the theft of the Dragon's Tooth Sword). However, if you decide to assassinate her on your first visit to her home, she doesn't appear in Versalife's research labs having a conversation with Bob Page, nor does she confront you at the Universal Constructor. Conversely, it is possible to kill Maggie while she is behind the window talking with Page in Versalife, and she will not appear in the following UC confrontation (although Page doesn't respond and walks off/can be killed, but the game doesn't recognize that as a viable possibility).
* If you barge into the women's bathroom, your boss chastises you for it later. (''VideoGame/MassEffect2'' has since done so as well.) The woman you encounter, Shannon, will also behave differently toward you for the rest of the game. If you don't go in, then she generally acts civil and friendly. But if you do into the bathroom, she'll never let you hear the end of it. In your next meeting with Manderley he will reprimand JC on his intrusion into the women's bathroom as "unprofessional".
** Shannon will later admit to you that she's the one who's been stealing weapons and ammo from the armory if you go and see her in the break room of UNATCO HQ [[spoiler: while you're breaking out of there after being captured by Agent Hermann or Agent Navarre]]. She'll also offer to sell you scrambler grenades. If you ''then'' go back to Sam Carter (or talk to Shannon before seeing him) and talk to him, JC will inform him who the armory thief was, and Carter will then reveal there's more to the story than you know, and Shannon's gonna be facing an ugly surprise in the morning.
* There are a whole range of options that result from the character of Sandra Renton. Not only can she live or die based on whether JC rescues her from Johnny or not, but how he deals with Johnny influences later actions. The later conversation with Jojo at the 'Ton can also result in several scenarios: give Gilbert Renton a gun and stay at the hotel with her father, knock out or kill Jojo yourself and Sandra will leave in disgust (before appearing later in the game at the abandoned gas station), or give Gilbert a non-lethal alternative like a crossbow to defend himself. It is also possible to meet with Jojo before the confrontation and kill Gilbert and Sandra on his behalf instead.
** If Sandra Renton dies prior to JC visiting NYC for the third time (usually as a result of player action), when asked by the soldier in the Underworld Bar if he knows her, JC will lie and say that she was killed by Jojo Fine.
* Similar to the ''VideoGame/SystemShock'' example mentioned on the main page, getting a basketball through (or very close to through- off the backboard and rim works as well) a hoop in Hell's Kitchen will spawn the message, "Someone sign him up for the Knicks!"
** If you do this the first time you're in Hell's Kitchen and then do it ''again'' when you return, you'll get a different message - "You should be playing football - Go Cowboys!" (Ion Storm was based in Texas.) On your third visit to Hell's Kitchen there is yet another new message for doing this.
* At Vandenberg, if you run back up to the roof after ending the lockdown and visiting the scientists in the comm building (despite having no reason to do so), the researcher on the roof has additional dialogue praising your skill.

* When you visit UNATCO after completing the mission in Hell's Kitchen (during Walton Simons' visit), you can watch the interrogation of the terrorists captured in Castle Clinton. You can go into the cell once the doors are open, watch the interrogation, and even execute or interrogate them by yourself. The interrogator ([[spoiler:Walton Simons]]) is not amused, and tells you so, as do his goons. Conversely, leave him alone, and said goons will thank you for being considerate of their boss.

* You can choose to retrieve the neuroplasticity calibrator for Koller from Otar Botkeveli's casino ''before'' you're asked to. Doing so causes an entirely different cutscene (and an achievement, to boot!). Koller is gobsmacked when Adam reveals he has the calibrator, but says that he's not ready to dive in just yet. He also tells Adam to contact Sarif, and says that he's going to do some research before installing it. It should be noted that doing this also makes the mission chain involving Otar's errands unavailable, making this sequence more of a curiosity for enterprising players.

[[folder:Deus Ex: Mankind Divided]]

** In fact, many characters notice your behavior. For example, if you killed no one in the factory, Zeke Sanders will believe you more when you say you don't want trouble.

* If you sneak into The Hive before visiting Hengsha Court Gardens when you first arrive in China (something you wouldn't normally think to do), an alternate cutscene plays where Tong talks to a Belltower operative about Van Bruggen.

* In ''The Missing Link'', [[spoiler:Keitner]] will say different dialogue depending on how you dealt with the soldiers on your way to the person who set you free: If you kill a lot, she'll call you out. If knock a bunch out, she'll put a lot of her men into comas. If you remain out of combat entirely, she compliments your "ghost" routine, and encourages you to keep it up.

* Similar to the ''SystemShock'' example mentioned on the main page, getting a basketball through (or very close to through- off the backboard and rim works as well) a hoop in Hell's Kitchen will spawn the message, "Someone sign him up for the Knicks!"