After the introduction, when you are walking back into Sarif HQ (during a cutscene), note that the side of the security cameras references "Big Bro Surveillance." That's a nod to George Orwell's classic science fiction novel, 1984, wherein people's actions are monitored by the menacing "Big Brother."
Demolition Man Reference
When infiltrating the penthouse apartment in Hengsha for the mission "Hunting the Hacker," you can hit up the bathroom and find 3 seashells instead of toilet paper. This is a reference to the 1993 movie Demolition Man.
Deus Ex Reference: Smash the State
There's a sidequest where you run into Officer Nicholas (after obtaining Sandoval's location mid-to-lateway in the game) and are told to eliminate Jacob White (a member of Motor City Bangers). According to your mission log, the sidequest is named Smash the State. This is a reference to the original Deus Ex in which "smashthestate" was used as one of the first obtainable security logins used for gaining access to a central building on Liberty Island. The pocket secretary that you pick up from White also references smashthestate in the address heading.
Easier Passcode Input
When inputting keycodes or passwords, you may use a USB keyboard for the Playstation 3 or Xbox 360 to serve as your "keyboard". You may also use a system-approved mini-keyboard (or chat keyboard) for this purpose.
Easy Funicular Wait
In Picus Communications, when you have to wait for the Funicular to come up, there will be enemies that will arrive to fight you. Before you hit the elevator button, block both entrances into the room with heavy objects. This is only possible if you have the Move/Lift Heavy Objects augment.
There are two vending machines outside the room, two crates (one short, one big) next to the security computer, and the turret in the center that can be used to block the lower doorway and the side corridor.
If you block the doorways correctly, the guards will stay in another room outside the whole time you're waiting for the Funicular. It would be wise to save before you hit the elevator button in case the barricades don't work.
Easy Storage
If you want to store an item instead of lugging it around, just throw it on the ground. The game always saves the location of items -- even if you leave the region.
Easy XP
There are two ways to gain a lot of extra XP with minimal effort: Hacking and Non-Lethal Actions
Hacking: when every you get the chance, and if you have the appropriate level of hacking skill, hack everything you can. These simple tasks will earn you easy XP, and can even unlock extra goodies along the way (an access code, extra credits)
Non-Lethal Actions: Non-lethal takedowns/kills earn you more XP than you would with lethal ones. Also, if you have the Reflex Booster augmentation (which allows you to take down two enemies at once) you can earn an easy 125 XP from a NL takedown than from a lethal.
Fight Club Reference
At the Hive's men's restroom, there is a pocket secretary that gives the door code for the back room that also states that someone broke the first rule by talking about what goes on in the basement. Its simply signed T. This is a reference to Fight Club.
Final Fantasy 27 Reference
When you enter Pritchard's office, look on his wall above his motorcycle to spot the Final Fantasy game of the future.
House Reference
In the sidequest you get from Malik in Shanghai(Shanghai Justice),you have to meet with a guy called Anonymous X. He will give you an autopsy report. If you look closely there is a sentence Dr. House said once, "All that is necessary for triumph of evil is that good men do nothing." Also if you look who wrote the report you'll see that the name of the doctor is 'Dr. Gregory H. M.D.'
Infinite Ammo: The Turret Method
Upgrade Hacking and Strength and you can pick up turrets, which have infinite ammo. Set them down or, let them fire while you move, to clear out a room easily! you still get XP points, and even headshots. you can also do this with robots.
Infinite XP Hacking Exploit
Best find a terminal that has a lot of XP awards (Adam Jensen's laptop in Sarif Industries is a good candidate, as revealed by the dude in the video).
Basically:
Save the game before attempting to hack a terminal or device.
You will be reloading the save file made in step 1 after each successful hacking attempt.
Successfully hack the device (preferably the security node, so you unlock all the data stores).
Use as many Nuke Viruses and Stop Worms as you need, since you will be reloading the game.
Once the device hacking is successful, you will be presented with the hacking results screen, and the prompt to continue.
Do not press the button to continue.
Load the save game made in step 1 instead.
Repeat steps 3 to 7. You will notice the totals on the hacking results screen increase and accrue from your previous attempts.
When you are ready to barf twice, accept the hacking results and the 'Updates' notifications will show the results of all your prior attempts.
Note: The data packets earned from hacking and reloading are are still issued if you complete a on different terminal. So, if you milk Jensen's terminal, you can walk accross the hall and still get it all.
Look Around During Dialog
During 3rd person, non-cutscene dialog between Adam and another character, you can look around by holding down the AIM button and looking around with normal controls.
Lots of XP in China
In Hengsha, every store has a back door. Open it and walk inside for a Traveler bonus of 100 XP.
Megadeth Reference
In a secret room in Singapore hangar below control switch you'll find level 5 computer and cooling upgrade. There is an email on a computer named 'Hangar 18,' written by Dave One. This contains sections of the lyrics to the Megadeth song Hanger One. The computer user MSTAINE is a reference to Megadeth member Dave Mustaine.
Note that finding this computer grants the Hangar 18 Trophy / Achievement.
Office Space Reference
There is a computer in the Singapore secret facility that has an email that mentions someone needing to return a stapler. This is a reference to the movie Office Space.
QR Codes
The QR codes on boxes and other things in the game are real. Scan them off your screen with a cellphone to read the hidden messages.
Robocop Reference
In the Detroit police station you can find one officer that may seem particularly familiar... Robocop's human precursor was named 'Alex Murphy,' and the guy at the desk talking about 80s movies has the same name.
Secret Achievements
Unlock Xbox Live Gamerscore points, by completing the following Achievements!
Achievement
How to unlock
Balls ( 5 points )
Seems you like playing with balls, eh?
Darker Shades ( 15 points )
You convinced a fast-talking bartender to let you see Tong Si Hung.
Ghost ( 15 points )
You made it through an entire hostile area without so much as a squeak.
Good Soul ( 15 points )
Against all odds, you saved Faridah Malik's life.
Guardian Angel ( 10 points )
You paid poor Jaya's debt in full. How very.. humane.. of you.
Hangar 18 ( 10 points )
You found and read the secret message. Now you know too much.
Kevorkian Complex ( 10 points )
You granted a dying man his final request.
Ladies Man ( 10 points )
You convinced Mengyao to spill the beans on the mysterious Hyron Project.
Lucky Guess ( 10 points )
Next time, Jacob better use a more complex code to arm his bombs.
Old School Gamer ( 10 points )
You found all the hidden story items in Megan's office. Point and Click much?
Sentimental Value ( 10 points )
You kept Megan's bracelet for yourself. Apparently, letting go really is the hardest part.
Super Sleuth ( 10 points )
You really nailed your case against Lee Hong.
The Bull ( 25 points )
You defeated Lawrence Barrett, elite member of a secret mercenary hit squad.
The D Project ( 15 points )
You watched the entire credit list and saw the surprise at the end.
The Desk Job ( 15 points )
You convinced Wayne Haas to let you into the morgue.
The End ( 25 points )
You defeated Zhao Yun Ru and destroyed the Hyron Project.
The Fall ( 10 points )
You sent Diamond Chan on the trip of a lifetime.
The Final Countdown ( 15 points )
You showed millionaire Hugh Darrow that his logic was flawed.
The Last Straw ( 15 points )
You talked Doctor Isaias Sandoval out of suicide.
The Mantis ( 25 points )
You defeated Yelena Fedorova, elite member of a secret mercenary hit squad.
The Snake ( 25 points )
You defeated Jaron Namir, Leader of Belltower's Elite Special Operations Unit.
The Take ( 10 points )
Greedy bastard. You accepted O'Malley's blood money and let him go.
The Throwdown ( 15 points )
You convinced the smooth-talking politician Bill Taggart to tell the truth in public.
Unforeseen Consequence ( 15 points )
You convinced Zeke Sanders to let his hostage go.
Yes Boss ( 15 points )
You had an argument with your boss, David Sarif, and won.
Star Wars Reference
In the FEMA Detention Center, there is an email in one of the computers titled "Clean up of parking area." After the body of text, there is a postscript: "P.S. Episode 9 tonight? If so, let's go early. I hate standing in lines."
This is likely a reference to the rumored continuation of the Star Wars series with a new trilogy of episodes numbered 7-9 set to take place after the original trilogy, as well as a nod to the fact that Star Wars movies are notorious for having long lines on opening weekend.
Various Achievements
Unlock Xbox Live Gamerscore points, by completing the following Achievements! Yay!
Achievement
How to unlock
Acquaintances Forgotten ( 10 points )
Follow Pritchard's lead to uncover the truth.
Bar Tab ( 10 points )
Help the Hive Bartender settle a tab.
Cloak & Daggers ( 10 points )
Deal with the man in the shadows.
Consciousness is Over-rated ( 15 points )
Knock out 100 enemies in a single playthrough.
Corporate Warfare ( 10 points )
Protect a client's interests by performing a less-than-hostile takeover.
Deus Ex Machina ( 50 points )
Experience all the different endings that Deus Ex: Human Revolution has to offer.
Doctorate ( 50 points )
Read all 29 unique XP books within a single playthrough.
First Hack ( 5 points )
Perform your first Hack successfully.
First Takedown ( 5 points )
Perform your first Takedown. Civilians don't count, so be nice.
Foxiest of the Hounds ( 100 points )
Complete Deus Ex: Human Revolution without setting off any alarms.
Gun Nut ( 20 points )
Fully upgrade one of your weapons.
Hax0r1! ( 15 points )
Successfully hack 50 devices within the same playthrough.
Legend ( 100 points )
Complete Deus Ex: Human Revolution at its hardest setting without ever changing the difficulty.
Lesser Evil ( 10 points )
Deal with Mr. Carella's indiscretion.
Motherly Ties ( 10 points )
Put a grieving mother's doubts to rest.
Opportunist ( 15 points )
Perform 50 takedowns within the same playthrough. (Civilians do not count)
Pacifist ( 100 points )
Complete Deus Ex: Human Revolution without anyone dying by your hand. (Boss fights do not count)
Rotten Business ( 10 points )
Help a lady in the oldest of professions clean house.
Shanghai Justice ( 10 points )
It may take some sleuthing, but justice must be served.
Smash the State ( 10 points )
Help Officer Nicholas take out the trash.
Talion A.D. ( 10 points )
Descend into the bowels of an urban jungle and confront a warrior-priest.
