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.
Deal with the man in the shadows.
Greedy bastard. You accepted O'Malley's blood money and let him go.
You convinced Wayne Haas to let you into the morgue.
You convinced Zeke Sanders to let his hostage go.
Knock out at least 100 enemies in a single playthrough.
Protect a client's interests by performing a less-than-hostile takeover.
You talked Doctor Isaias Sandoval out of suicide.
Help Officer Nicholas take out the trash.
You convinced the smooth-talking politician Bill Taggart to tell the truth in public.
Perform 50 takedowns within the same playthrough. (Civilians don't count.)
You defeated Yelena Federova, elite member of a secret mercenary hit squad.
Fully upgrade your first augmentation of choice.
It may take some sleuthing, but justice must be served.
You really nailed your case against Lee Hong.
Successfully hack at least 50 devices within the same playthrough.
Help a lady in the oldest of professions clean house.
You sent Diamond Chan on the trip of a lifetime.
Help the Hive Bartender settle a tab.
You paid poor Jaya's debt in full. How very... humane... of you.
You convinced a fast-talking bartender to let you see Tong Si Hung.
You defeated Lawrence Barrett, elite member of a secret mercenary hit squad.
You made it through an entire hostile area without making so much as a squeak.
Put a grieving mother's doubts to rest.
Deal with Mr. Carella's indiscretion.
Upgrade your first weapon of choice.
Perform your first Hack successfully.
Perform your first Takedown. Civilians don't count, so be nice.
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.
Follow Pritchard's lead to uncover the truth.
Descend into the bowels of an urban jungle and confront a warrior-priest.
Fully upgrade one of your weapons.
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 found all the hidden story items in Megan's Office. Point-and-Click much?
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 kept Megan's bracelet for yourself. Apparently, letting go really is the hardest part.
Maybe next time, Jacob will use a more complex code when arming a bomb.
You granted a dying man his final request.
You convinced Mengyao to spill the beans on the mysterious Hyron Project.
Seems you like playing with balls, eh?