Here is the full list of all 49 Deus Ex: Human Revolution achievements. It takes around 40-50 hours to unlock all of the achievements on Windows.
You had an argument with your boss, David Sarif, and won.
You defeated Lawrence Barrett, elite member of a secret mercenary hit squad.
Fully upgrade your first augmentation of choice.
Deal with the man in the shadows.
Greedy bastard. You accepted O'Malley's blood money and let him go.
Put a grieving mother's doubts to rest.
You kept Megan's bracelet for yourself. Apparently, letting go really is the hardest part.
You convinced Wayne Haas to let you into the morgue.
Deal with Mr. Carella's indiscretion.
Seems you like playing with balls, eh?
Upgrade your first weapon of choice.
You convinced Zeke Sanders to let his hostage go.
Perform your first Hack successfully.
You made it through an entire hostile area without making so much as a squeak.
Perform your first Takedown. Civilians don't count, so be nice.
You found all the hidden story items in Megan's Office. Point-and-Click much?
Perform 50 takedowns within the same playthrough. (Civilians don't count.)
Successfully hack at least 50 devices within the same playthrough.
Knock out at least 100 enemies in a single playthrough.
Complete Deus Ex: Human Revolution.
Complete Deus Ex: Human Revolution at its hardest setting.
Experience all the different endings that Deus Ex: Human Revolution has to offer.
Complete Deus Ex: Human Revolution without anyone dying by your hand. (Boss fights do not count.)
Complete Deus Ex: Human Revolution without setting off any alarms.
Read all 29 unique XP books within a single playthrough.
Help Officer Nicholas take out the trash.
Follow Pritchard's lead to uncover the truth.
Help the Hive Bartender settle a tab.
Help a lady in the oldest of professions clean house.
It may take some sleuthing, but justice must be served.
Protect a client's interests by performing a less-than-hostile takeover.
Descend into the bowels of an urban jungle and confront a warrior-priest.
Fully upgrade one of your weapons.
You defeated Yelena Federova, elite member of a secret mercenary hit squad.
You defeated Jaron Namir, Leader of Belltower's Elite Special Operations Unit.
You defeated Zhao Yun Ru and by doing so, destroyed the Hyron Project.
You convinced a fast-talking bartender to let you see Tong Si Hung.
You convinced the smooth-talking politician Bill Taggart to tell the truth in public.
You talked Doctor Isaias Sandoval out of suicide.
You pointed out the flaws in his logic to millionaire Hugh Darrow.
You watched the entire credit list and saw the surprise at the end.
Against all odds, you saved Faridah Malik's life.
You found and read the secret message. Now you know too much...
You paid poor Jaya's debt in full. How very... humane... of you.
Maybe next time, Jacob will use a more complex code when arming a bomb.
You granted a dying man his final request.
You sent Diamond Chan on the trip of a lifetime.
You really nailed your case against Lee Hong.
You convinced Mengyao to spill the beans on the mysterious Hyron Project.