I never got around to all the achievements in the original game, so I did that over the past week or so. This guide works here (as opposed to the Director's Cut) for the Doctorate stuff. I don't think anything actually changed, but I figured I'd confirm it worked for me.

The Pacifist and Foxiest achieves are pretty buggy in both this and Mankind Divided. I did at least one run in both versions of HR and in MD where I didn't get the achieves despite playing very carefully. And in both HR runs where I got Pacifist, I found dead bodies I didn't kill (but had previously KO'd) and still got it.

So if you did everything perfectly and the achievement didn't pop, it's probably just the game being dumb. Those two are generally easiest if you dedicated a run to them and just ignore most of the content. Don't KO anyone unless necessary, and just stealth past everything. Also, it's a lot easier if you just look up all the required codes and passwords instead of hunting all over the levels.

9 years old, and still plays good! Your guide was helpful. Thanks!

Very helpful. Thank you

@q51: Glad I could help! And sure, please do write a guide - if you would have done things differently, some other people might too - and maybe it will help them more than my guide does :)

so i did it. 100% in my 1st playthrough (in my 1st dx ever). the guide was helpful, thank you. big job to do - respect.
anyway, to be true, i'd do such a guide different way... and maybe i will.

Yup, thanks again! And congrats for having done them. I'm not very good in hardcore achievements, but it looks like you have collected several of the most difficult ever. ;D

The AOE weapon being PEPS, right? Yeah, you have to take care when using it. It can kill people easily if it throws them against a solid object like a wall.

Foxiest of the Hounds is by far the most difficult, however as you said, you might want to try them on easy difficulty :)

I'm pretty sure one of them was dead when I've thrown that flash grenade while escaping to the Elevator in that small little room... and I had no lethal weapons myself... so he either was crushed by a mate's body, or they killed him on friendly fire due to lack of room... I've this feeling it could've also broke my achievement... Also in the final level, when you use that weapon against crazed augmented people... It causes small explosions in the air as it is aoe, so despite being non-lethal I guess someone died there too... These 2 are really difficult achievement, specially the one of alarms, probably toughest in the game. If I do, I'll retry them in easy difficulty, it's enough to handle all the casualties coming from the buggy physics, to add up more trouble. :D

Thanks a lot for your answer!

Yeah, you can reload a previous save, just be sure it's not comprimised (it's not created after you knocked someone out). You can use them as backup.

Civillians dying to the gas bomb... that one is tough. The game isn't consistent: failing the Sandoval dialogue challenge will result in him shooting himself, and depending on the game version, it can break Pacifist. On other occasions it doesn't count as a kill though. So I really can't tell for certain, sadly.

Bodies collapsing: they shouldn't in theory, but the game has buggy physics, so theoretically it could happen. Never happened to me before though.

Hi there, nice guide. Wanted to ask you a few tips. :) First of all, can I reload a previous savegame if I notice my Pacifist or Foxiest of The Hounds could be compromised?
About Pacifist, do civilians eventually killed by the gas bomb count toward locking this? Could bodies collapsing onto each other generate kills? My previous playthough failed tho I never killed anyone directly, so I was trying to understand what could've gone wrong...