Alternate History: The backstory begins in the aftermath of the Northeast blackout of 2003, which in this universe was deliberately caused by a disgruntled employee, T-Bone Grady, also known as Raymond Kenney, the creator of the ctOS as opposed to the grid being overexerted due to lack of maintenance and external factors, as it was in real life.
This can and often will lead to civilians also becoming active hazards, since many will dial 911 at the first sign of trouble (or, if your Reputation is low enough, simply upon seeing you), causing the police to hone in on your location if you don't interrupt the call quickly enough. Considering you spend much of the game on the run from the cops, this isn't exactly a good thing. Luckily, you can throw their phones on the ground to intimidate them, hold them at gunpoint (if they're looking in your direction), jam their phone signal, or just shoot them.
This can, however, be turned to your advantage. Got an area full of enemy mooks that are giving you trouble? Fire a few shots into the air so that a civilian calls the cops, let the ctOS scan detect you, then hide in an area close to where the mooks are. Watch and be amazed as the cops clear out the mooks for you!
Fixers and other enemy mooks will actively chase you down. If you run too far and try to abandon a shoot-out, they'll get into their cars and hunt you down.
During Criminal Convoys, if you take down the front car, the rest of the convoy will stop (much like real life), with the target taking cover as far back as possible, with the mooks and bodyguards going in to take you out.
During an active pursuit, police cars will split up, cover side roads, and attempt to shepherd the player into roadblocks.
Raising a bridge during a car chase will net you a kick-ass jump, and leave your pursuers behind, often with by willingly driving off the bridge. Into water even.
Parking by the side of the road can result in a pile up of cars who won't drive around despite huge space to do so.
The vehicle driving AI can't handle being boxed in properly.
Vehicles will smash into dozens of other vehicles with the slightest bit of panic.
Going into the water can result in enemies unable to figure out how to jump over obstacles, blocking the rest of the people chasing you.
AI NPC's hanging out on the docks will fall into the water constantly.
NPC's will drop their phones and walk away if slightly bumped.
If you stand around two NPC's kissing, they will continue to make out while the woman will tell you to go away and eventually, while in the middle of french kissing the other NPC, will say "I will scream rape".
If you slightly bump someone about to call the cops, with your car they will stop. No-one else will ever try calling the cops even if you leave the general area.
The on foot evasion AI will not go around obstacles at all, instead electing to 'parkour' over them, which can result in 50 year old construction workers jumping over traffic cones, or taking a route that is far slower than simply running around the obstacles.
The Police AI is utterly incapable of pursuing you if you go into the water, even though they have helicopters. Police boats exist, however they do not appear while being pursued.
Even worse, you can escape the police by riding The L-Trains and continue to hack it so it leaves the station when it stops at one. And you can see them still tailing you.
Enemies whose explosives you hack don't run after throwing them. Enemies whose explosives you hack also lob their explosive at waist level. Combine these two unassuming behaviors with a barrier in front of an enemy at least waist-high, and what happens?
Arson, Murder, and Jaywalking: The Profiler can show you little hints about what a person is like. This can range from wanting to be a chain divorcer, a musician with quite the crime record, or someone who frequents fetish sites. One very dark example of this is an HIV positive blood donor.
Anti-Frustration Feature: As long as you don't hit civilians or cause major damage while driving, the police will not come after you no matter how many traffic rules you break. They also don't respond when there are fixers trying to gun you down.
Also why Aidan's phone never runs out of battery charge outside of the battery cells you use to power hacks.
Anti-Hero: Aiden Pearce is some form of this. How far he slides on the anti-hero scale is mostly up to the player. He'll never be a squeaky clean white knight, but you can do everything from using the city's crime detection network to protect the citizens, to stealing from peoples bank accounts and selling their cars to chop shops. In the first gameplay trailer, Aiden causes a roadblock to trigger to catch one of his targets - and when he's sneaking around the crashed cars, there are very clearly some dead civilians, thanks to wrecking their cars.
Augmented Reality: Some of the minigames take place in some form of this: they're a game within Aiden's phone that lets him collect floating "coins" as he platforms around the place (Coin Rush) or shoot up space invaders (NZVN).
Best Served Cold: Aiden is on his quest of vigilantism after someone intending to kill him instead killed his six-year old niece.
Big Brother Is Watching: The topic of intrusive and all-encompassing surveillance will be a big one in the game and taken Up to Eleven in that other players can spy and intervene from security cameras.
Big Damn Heroes: When you intervene and prevent a crime the Profiler alerts you to, you are this.
Blackmail: The reason a hit was ultimately put on Aiden. Lucky was just trying to protect the blackmail he had on the mayor, who killed a woman who was also a Blume executive. Iraq also takes part in this, collecting a large amount on everybody which he keeps in his server room.
Bittersweet Ending: The main villains in the game get their asses handed to them, but most of Aiden's allies are dead, traumatized, or angry; Iraq, Lucky, and Damien are killed by Aiden, a slavery ring is cracked down, and the Macguffin secret files are used to expose mass corruption in the city, including the mayor. However, Clara dies, Nicky and Jackson are seriously traumatized and leave the city, Aidan and Damien's final battle causes untold amounts of damage and ctOS is declared a success and expands to multiple cities around the world. Dedsec is NOT pleased by this turn of events, and becomes more extremist. Pretty much the only two people unaffected by the ending are T-Bone and Jordi.
Bonus Feature Failure: As fun (and frustrating) the Digital Trips can be, there's no point in playing them at all, besides clothing. They aren't even included in the game's completion rate thanks to being added in late in development.
Most of the pre-order exclusive missions fall into this, with two notable examples being Breakthrough, which is little more than a glorified Criminal Convoy, and "Signature Shot", which is pretty much your standard "tail the guy and then kill everyone at his destination" mission.
Boss In Mooks Clothing: Enforcers may count as this, as they take a lot of punishment, carry high-powered weaponry, and can't be taken down with melee without unlocking a 5-point skill. They typically only appear at most in pairs accompanying larger groups of lesser mooks. Later subverted with Iraq, who is classified as an Enforcer but is an actual boss.
Bullet Time: The "Focus" ability, unlocked early on. Developers said that it represents Aiden's quick thinking and reflex.
Canon Welding: Averted. Refrences to Abstergo are littered throughout the game, with the implications being that the two games share the same universe. However, Ubisoft said that while they considered it, it was decided that it wouldn't go beyond references or minor cameos.
The Cameo: Olivier Garneau is a target during the Fixer Contracts. Looks like the Assassin Brotherhood outsourced a "hit" to Aiden under the guise of a child abandonment accusation.
Coat, Hat, Mask: A modernised version with sweater and jeans under the Badass Longcoat, a baseball cap instead of a fedora and a neck gaiter that he pulls up over this mouth and nose when he's about to do something overtly illegal for the mask. It looks more badass and less Hipsterish than it sounds. Although the downloadable "1920 Mobster" outfit replaces the baseball cap with a proper fedora.
Contractual Boss Immunity: You can't use a melee takedown on Iraq even if you've unlocked the ability to use melee takedowns on Enforcers.
Could Have Avoided This Plot: Late-game, Aiden Pearce realizes a bit too late that Lucky Quinn is behind it all. He even said himself during their first encounter that he'd be doing the city a favor if he just shot Quinn right then and there, but "that kind of thing always comes back to bite you." Little did he know it was already biting him. Aiden curses himself for not handling it sooner when he realizes Quinn is his ultimate target.
Justified, however, in that at the time, Aiden didn't know Lucky Quinn was the one who ordered the hit; to Aiden, he was just another scumbag running the city behind the scenes, which makes for a poor reason to outright murder someone and risk having their entire mob all over you.
Cutscene Incompetence: Usually averted by way of a subversion; most often a cutscene will happen, Aiden will do something stupid (like surrender,) then the buttons you normally press to do things like hack, enter bullet-time, or deliver a melee smackdown will appear on the screen, QTE style (only not very quick,) letting Aiden kick ass, gaining the upper hand or at least restoring the balance and putting the player back in control. That said one massively jarring and heart-breaking example of this trope plays out to full effect near the end of the game with Clara's death.
Aiden can unlock a skill for his phone that lets him start and stop trains at will. One mission requires you to use this ability—but if you don't have it already, Clara will send him a one-use-only hacking exploit to get the trains moving.
Some of the random facts on citizens can be... odd. For example: "Sexually attracted to musical instruments." This makes it rare to see the same fact twice, and if so it's more common to see something that would apply to multiple people.
One of the game's Side Quests involves using cameras to assemble and scan QR codes to obtain hidden audio logs. Got the bright idea to try and scan one with an actual QR reader? They've covered that, too.
Feel safe killing that NPC whose profile says "Sex Offender" and accepting the minor hit to your reputation? What happens when you see "Removed from the Sex Offender Registry" Is that offender you want to kill a legitimate sex offender or is it one who will be removed when evidence exonerates them?
If you ever manage to get behind the wheel of a police car, you'll hear police dispatcher chatter you never hear at any other time.
Disc One Nuke: It is quite possible to unlock a number of powerful weapons before continuing the campaign, such as the Spec Ops Goblin (complete the Weapons Shipment collectibles) or the Destroyer (complete 10 Criminal Convoys).
Double Unlock: Some skills require you to do diverse things or activities. This can range from doing 10 Chess game puzzles to completing investigations. This first and biggest one that players will meet is the one that requires the player to have passed a certain story mission before they can have access to the rest of the skill trees.
Dragged into Drag: One of the Privacy Invasion collectables is a man being dressed up as a princess (off camera) by his daughter (and his attempts to talk her out of it without upsetting her).
Drop-In-Drop-Out Multiplayer: The developers decided to let other players join one's single-player campaign spontaneously, without explicitly splitting the single and multiplayer modes. However this is an optional feature so offline players can still enjoy their game with no adverse effects, and if you'd rather play online and not get hacked? Don't worry, there's an option to be unable to be invaded.
Dueling Hackers: At some points in the game, other hackers will start to use your own city-hacking tactics against you Defalt and Damien, to be specific. Multiplayer also has you trying to find other fixers. All of these are justified variations of the trope, as the hacking here has to do with messing with the city and the other people's phones on foot instead of pure programming. Though the traditional thing happens with Defalt and Damien as well.
Elite Mooks: Two levels of Elites. One being exactly what it says and that they can go down easily with a headshot. The others are juggernauts who usually need explosives to take down or, if you have the perk, melee them down.
Even Evil Has Standards: Ded Sec in the Gamescom 2013 trailer hacks a public service broadcast to make it clear that Aiden (who is abusing the ctOS and is called a vigilante) is not one of them, and is acting separate from other groups interests. Varying on the playstyle, Aiden can be this.
Face-Heel Turn: Though Jordi never pretends he's anything more noble than a hired gun — and Aiden even speculates openly at one point that they could be hunting one another if circumstances were only slightly different — his eleventh-hour switch from Aiden's ally to his enemy certainly counts as this.
Game-Breaking Bug: Around the first month that the game was out, there was a bug that had a random chance of either permanently deleting all of your currently-held weapons or corrupting your save file where loading it got it stuck at the 90% mark (thus leading to it being called the 90% glitch) if you were killed while invading another player's game. If you didn't wait the patch out that fixed your save file, your only option was to start over from scratch.
Genre Savvy: Delford Wade (aka. Iraq) is the chief of Viceroy gangster that knows technology. As such, Iraq's secret room has no cameras for you to hack. You need to go inside yourself.
GIFT: You would be surprised what people say when they think you can't see them.
G.I.R.L.: Inverted. Badboy17 isn't a boy. Or 17. She's a French Canadian hacker, named Clara Lille.
A God Am I: Damien. When you are able to crack the entire network at your fingertips, you can practically do almost anything, but he gets a bit too full of his own power.
Grey and Gray Morality: Neither Pearce nor his opponents are afraid to get their hands dirty. Aiden makes sure to not be overly cruel or callous when dealing with his enemies—one time he goes through an elaborate prison infiltration just to intimidate a witness into silence instead of killing the guy—but on the other hand he's still a thief and his primary means of income is siphoning people's ATM accounts.
Guilt-Free Extermination War: Three of the major enemy groups you can kill without any karma penalty. Fixers, Gang members, and ctOS guards. The first two as they are criminals, and the last one because all of them have really sketchy histories. Also when stopping crimes you only get less Karma if you kill them. Or penalized, depending on the crime.
Hacking Minigame: Mostly averted, surprisingly - almost all hacks are just one click of the button. The REAL trick is figuring out what to hack and when. Played straight with the privacy intrusions, which sometimes present a minigame to reach the area you're trying to intrude.
Have You Told Anyone Else?: Establishing Character Moment for Lucky Quinn: a nervous thief you've delivered to him during a partially-botched (but successful!) mission reports in to Quinn. Quinn fake-consoles him and asks "Have you had a chance to talk to your girl? Your mama? Your friends?" Then he executes him without warning.
Pearce himself can do this, stopping random acts of crime.
Hero Insurance: Aiden has no qualms in blowing up roadways, causing multi-car pileups, and generally causing a lot of collateral damage in the name of justice, nor does anyone seem to mind unless you're actively killing civilians in the process. Even more egregriously, if the ctOS Mobile mode is any indication, neither do the police.
Hero with Bad Publicity: Aiden is an outright wanted criminal who's trying to kill certain targets, but seems to be trying to do the right thing. Unfortunately, his targets control the ctOS. Of course if you have Aiden take on extreme methods and do stuff like killing police officers and Innocent Bystanders indiscriminatingly, you aren't giving the citizens of Chicago any reason to doubt that reputation.
Hollywood Hacking: Hacking is an important game mechanic, so some liberties are unavoidable. It's justified by Aiden not hacking per se, so much as using exploits and backdoors he made when creating the ctOS. See Magical Smart Phone below.
Insurmountable Waist High Fence: Hacked (raised) bridges become this to AI pursuers. Almost any vehicle can make the jump between one end of the bridge and the other — certainly any vehicle driven by pursuers — but you can hack the bridge, speed up and over yourself, and be safe in the knowledge that they're stuck on the other side unable to come directly at you.
Interface Screw: During Act IV when you're going after Defalt, the screen glitches with brief glimpses of his face.Happens again in Act V when Damien is in control of the ctOS.
I Surrender, Suckers: Aiden faking surrender to cops before causing a blackout, knocking one out, shooting two others in the legs before taking off on a boat.
Karma Houdini: Blume, despite fulfilling all of the hallmarks for a corrupt Mega Corp., manages to escape any blame for the ctOS failure at the end of the game, as well as the numerous abuses committed by Lucky Quinn using their systems.
Karma Meter: One briefly flashes up in game after Pearce either stops or commits a crime, and it functions as a "reputation meter", meaning it gauges how the city thinks of you: either as a hero, or a menace, with civilians actions towards and around Aiden changing accordingly. For example, if Aiden is viewed positively by the city, they may refrain from calling the cops if they see him take down a target, simply assuming it's being done for the greater good. If viewed negatively, however, people will recognize him from news reports and call the police immediately. The karma meter is more of a risk-reward restraint; it's easy to fill up or empty. If you kill a few civilians in car accidents without redeeming yourself by stopping a few crimes, your meter drops sharply. You're not a GTA protagonist, and there is a consequence to driving on the sidewalk.
The majority of NPCs tend to have some hack-derived detail to damn them by, ranging from possessing stolen property or missing parole to Felony Misdemeanors like frequenting fetish websites.
This goes double for the mercenaries guarding ctOS server sites or gang members. Profiling them reveals all sorts of nasty things from abusive backgrounds to "killed a dolphin." (Seriously). Sometimes goes into You Bastard territory, as the game will note the guy you're about to beat senseless or shoot in the face may, for example, have serious mental health issues.
Knee Capping: One of the non-lethal ways to incapacitate enemy combatants.
Knight Templar Big Brother: Downplayed example, as Aiden actually is dealing with seriously evil assholes, but he responds to a crank call on his little sister by "taking down" the guy who did it, either with his baton or a pistol.
Letter Motif: Though two of them more commonly go by nicknames, all three major antagonists in the game have first names beginning with the letter 'D' - Delford "Iraq" Wade, Dermot "Lucky" Quinn, and Damien Brenks.
The Lopsided Arm of the Law: Aiden is better at using the crime-prevention system than the actual cops (who don't have complete access to it yet; it's still in beta-test), enabling him to find and expose criminal masterminds. They tend to come down on him like a ton of bricks instead of the other bad guys.
Luck-Based Mission: Online hacking, to an extent. Since you spawn in the vicinity of your target, if said target is in an isolated location with few to no pedestrians, it's virtually impossible to hack them without getting spotted.
Made of Iron: The police, oddly enough. Unless you use environmental takedowns to stop them, they will hound you to the ends of the Earth.
Magical Smart Phone: Aiden is shown jamming all communications in a ten foot radius to cause a distraction, getting personal information on people in his line of sight, making traffic lights all shine green to cause a six-car pileup, and finally raising a drawbridge as he jumps it to evade pursuit. All by fiddling with his phone one-handed. Often without looking at it. Justified in that he's using it to access back doors he himself made in the city's control system, which is hooked up to everything.
Mega Corp.: The Blume Corporation is responsible for developing ctOS, which enables them to access the private information of every citizen in Chicago, putting them in de facto control of the city.
Mighty Glacier: Enforcers. They're twice as tough and carry weapons twice as powerful as most of the other mooks you'll fight, but all that heavy armor and weaponry has a noticeable impact on their movement speed, meaning they're not able to take cover as easily. Of course, they make up for this by forgoing cover entirely in favor of marching towards your position while constantly firing their weapons in the hopes of outgunning you.
Money for Nothing: You'll likely hack hundreds of thousands of dollars out of civilian bank accounts, and earn even more cash from missions. The only thing to spend it on are weapons, crafting components, cars, clothes, and a few mini-games. Most guns can be unlocked via achievements or swiped off of enemies, and as long as you're not going into every encounter guns-blazing, ammo should never be an issue. Crafting components can be found lying around all over the place and can be procured easily via item dropoffs, buying cars is completely unnecessary as you unlock cars via achievements that are just as good as the ones you can buy, clothes are purely optional and amount to little more than Palette Swaps for Aiden's default outfit anyway, and the mini-games are typically so cheap that you can get your money back by hacking one person.
Mood Whiplash: Absolutely everywhere in this game. Hacking ctOS lets you look behind closed doors, any closed doors. One hack might net you a funny video of a guy yelling at the FPS he's playing, and the next will show you a cannibal making a quick snack.
Mundane Utility: Pearce's phone can set off EMPs, give him details on anyone he meets, raise drawbridges, crack someone's bank account or an ATM and steal a few grand... or just make phone calls with it.
A hilarious example comes when dealing with elevators. Aiden operates them by hacking into their control panels, instead of, you know, just pressing the buttons like any sane person would do.
Nice Hat: Aiden sports a ballcap. There's also a Mobster DLC outfit which gives him a fedora.
Defalt shares a lot of similarities with Deadmau5.
No Endor Holocaust: Averted. Everything Pearce does will have an effect. One character even states flatly that he's going to get people, innocent people, hurt. For example, the first time he causes a blackout in game for an entire baseball stadium, the police note that the outage also caused several arc lights to fall, injuring civilians.
No Flow in CGI: Averted as much as possible - Aiden's jacket in particular.
Pacifist Run: Word of God confirms that it's possible to get through the majority of the game with nothing but your trusty cell phone and some stealth. However, there will be some scripted sequences where gunfights and killing will be unavoidable. Also, knocking out an enemy with a non-lethal melee attack will earn the player double the XP than simply shooting and killing him.
Palette Swap: All of Aiden's costumes fall prey to this. There are some minor changes to the style of his coat and hat, but he's still wearing the same basic outfit.
Player Data Sharing: The game allows players to "hack" into other players' single-player campaigns to gain additional resources. In-game, the player being hacked experiences it as Pearce being tracked by hostile surveillance cameras. Wi-Fi hotspots in game can be used as a way for players to "gift" other players who also log in to the hotspot with money, ammunition, crafting components or other items.
Police Are Useless: Unless they're coming after Aiden, Watch_Dogs gives new meaning to the phrase 'no good deed goes unpunished'. Aiden gets one aversion out of this by calling the police on a human trafficking auction he just broke up.
Reality Is Unrealistic: Fences and traffic lights will crumble before your car - but not trees. Actually, in real life, such man-made fixtures are designed to snap away easily to limit damage and injury in a collision. Mother Nature grants no such mercy.
Revealing Cover Up: Somewhat. The whole plot kicks off with a currently unknown person wanting Aiden removed for stumbling on something he shouldn't have when hacking bank accounts. This leads to a Roaring Rampage of Revenge on Aiden's part.
Samus Is a Girl: You wouldn't think that someone identifying themselves as Badboy17 would actually be a woman named Clara.
Scenery Gorn: Rossi-Fremont. The whole place is falling apart, with entire buildings at least partially collapsed, and it generally looks like something out of a post-apocalyptic nightmare. One look will leave you amazed that people actually still live here.
Self-Deprecation: One ctZNOS video you can hack shows a father poking holes in his son's game of Assassin's Creed and wondering why there's always a confession when he kills a guy.
Sequel Hook: Despite the huge scandal resulting from Aiden's actions, Blume actually comes out stronger, with them ready to unveil ctOS 2.0, and one of their executives set to become the next mayor for Chicago. In addition, DedSec finally takes off the kid gloves and openly declares war against Blume, and they've also promised to take revenge on Aiden for refusing to grant them system access to ctOS.
Serial Killer: One of the side-missions has Aiden investigating murders committed by the "Fingerpaint Killer."
Shared Universe: With Assassin's Creed. While Word of God is that there won't be a crossover & each game is their own story, they do place Easter Eggs in one another that hint at the other game & exist in the same canon. Particularly, Aiden Pierce is responsible for killing a character from Assassin's Creed 4 who vanished in Chicago at that exact same time.
One potential enemy profile can state "Plays Rayman on mobile." Using it as a distraction causes the theme from the Land of the Livid Dead to start playing on their phone.
When tracking down Defalt in dotConnexion, one of the phones you can profile lists its occupation as "Fox Hunter", and its description is "Shhh, be vewwy, vewwy quiet."
Smart People Play Chess: Inverted Trope. There's a chess minigame which can be played at several locations. Playing it enough unlocks the final adrenaline mode skill; the in-game explanation for it is that it represents Aiden's ability to think quickly, implying that playing chess helped make him smarter.
String Theory: Aidan has one of these set up in the hotel room he lives out of. Oddly, he only references it a few times and you can't interact with it in-game at all.
Technopath: Aiden can hack so many things he may as well be one. If it runs off of electricity, he has some way of subverting it.
The Quiet One: Aiden's nephew, Jackson, has been quite mute since Lena's death, only ever speaking freely to his mother.
Title Drop: All of the story missions get name-checked while playing them, with the exception of "A Blank Spot There-ish", which happens before the actual mission. Also happens to the game itself near the end, just before you hack into the ctOS satellite. DEDSEC contacts you, asking for 30 seconds for them to upload their own program into the system so they can keep an eye on Blume, stating "We will be the watchdogs". Amusingly enough, despite being the protagonist, Aiden declines.
The Stinger: Want to execute the guy who got your niece killed because he didn't have the balls to fight back, or spare him because he lost his wife in the most horrible way as a consequence? Your choice.
Too Dumb to Live: Some mooks are smart enough to toss away hacked explosives before they can detonate. Others... aren't.
Disturbingly, much of the game's recurring themes. One central theme is the Darknet, a place where absolute anonymity (hence "dark" as in "you cannot see them and vice versa") is almost perfect and where piracy, crime, and even discussions about illegal acts are rampant. Seriously (You need to set up a special browser to access any of them). Vulnerability of the essential infrastructure to cyberattacks are topics hotly debated in media and beyond.
While the real Chicago does not have a ctOS, it does contain surveillance systems that are similar to those seen in the game. In fact when Ubisoft started the project in 2008, they were concerned they were making the various surveillance methods too unrealistic. Over time though they realized that the surveillance methods employed by their fictional Chicago and the real Chicago were disturbingly similar.
In the 90's, the Cabrini Green projects (stylized here as Rossi-Freemont) were known as "The Killing Fields" due to gang violence, with buildings fortified with sniper nests aimed at killing anyone that crossed the courtyard. Members of the Gangster Disciples and Vice Lords did indeed join the military and come back to train other gang members in military tactics.
Video Game Caring Potential: In addition to attaining your primary goals, you can intervene with unrelated matters, like a violent domestic dispute, simply for the sake of helping the non-Asshole Victim. Also, the dev team included sympathetic Profiler details for some enemies, things such as "Sole caregiver for ailing mother" in the hopes that it would make players think twice about using lethal force against them.
Vigilante Man: Aiden's cause appears to be some mix of this and La Résistance. His efforts to free the world from the stranglehold of information control and/or avenge some personal wrong done to him by the Chicago mob has put him at odds with the law but he knows it has to be done.
Virtual Reality: A step up from the AR games are the "Digital Trips," where Aiden plugs something in his ear that makes him hallucinate entirely new video game genres. Chicago itself is the same, but the rules of the game change, including Aiden's skill-set. It's actually a very clever way for the game to have its cake and eat it too—it can maintain the real-world, present-day setting with serious mood and crime drama, but still have room for goofy sandbox side activities. Some of them are definitely influenced by Aiden's psyche. The list of DT0's are:
Psychedelic: Aiden is literally tripping in this mode. Aiden is supposed to bounce from flower to flower, with more precise landings on the flower's bud increasing your score multiplier. However, hitting the ground resets your score multiplier, nets you a score penalty, and sends you back to the previous checkpoint.
Madness: You drive in a armored car trying to complete objectives involving mowing down demons. This mode has an announcer who seems to be a dark side of Aiden, (Played by the voice of Damien) wanting him to indulge on the murdering.
Alone: As the only lone human in a darkened Chicago, with security-camera-men patrolling the darkened streets, you have to bring light back to Chicago by deactivating generators scattered around the city. This mode plays more on stealth. His sister's voice is the Voice of the Legion, accusing him of destroying everything; even his entire family. "He should have been the one who died; not her."
Conspiracy: You use the profiler to uncover hidden cyborgs within crowds of NPC's, and shoot them in their weak spots to take them out. Once you're aware of them, they're aware of you, so you have to take them out quickly — very quickly in the case of the ones who can kill you from any distance with a 'Cyborg Bomb.' This digital trip is DLC and comes free with the Season Pass.
Weapon of Choice: Aiden's smartphone, and his collapsible baton and (non-collapsible) gun. The game promotes using them in that order.
What Happened to the Mouse?: One mission has you pursuing rival hacker Defalt in a harrowing car chase. It's possible for him to escape. If he gets away, he is never heard from again within the story, despite having figured prominently in the plot up to that point. In a weirdly appropriate example of the trope, Defalt wears a stylized mouse mask.
What Measure Is a Mook?: The developers actively try to discourage players from killing cops by averting this trope. If the player kills an officer his buddies will desperately try and call for medical assistance. The player will also be labelled a "cop killer" and the NPCs will react accordingly. You can even use your hacking abilities to bring up the personal data of "evil" mooks, such as finding out one of them is a military veteran who survived multiple tours in Iraq.
What You Are in the Dark: At times, Aiden is able to hack people's bank accounts and take their money, with no-one able to stop him since he won't be in the general area, but the players will have to decide if it's worth it on a moral level. The developers brought this up, using an example in a demo of Pearce taking the details of a mother with a newborn child. Lampshaded by the announcer in the "Madness" Digital Trip. As you mow down demons, the announcer will comment on Aiden, saying that he "wants to see all that wanted to do to everyone", while mowing down demons or dodging demonic cop cars.
The Windy City: The resource pack for the cityscape is even called this.
Wretched Hive: Rossi-Fremont. Not even the cops go there since the Viceroys have the whole neighborhood on lockdown. Hell, even Jordi won't go near the place, and Aidan only gets him to help by telling him he'll be assisting Aidan via sniper scope.