Rise of the Tomb Raider

I got it on this location in the Soviet Installation, this is probably the earliest point in the game where you can get it:

https://youtu.be/bzgwaThejMA

Fearless
Defeat a Deathless Swordsman using only melee attacks and a finisher

First possible story mode encounter:
Hidden City

Other possible encounters:
Chapter Replay, Score Attack Mode, Endurance Mode

Prerequesites:
Dodge Kill Mastery skill unlocked

Unlock conditions:

Dodge a melee attack from a Deathless Swordsman and confirm the QTE prompt well timed (shortly before the white moving ring reaches the innermost circle) and Lara will perform an animation that will have her pierce the foe's head with an arrow and kill them instantly.

Battering and prepping or beating down on the enemy with the axe is not required for this. 1 Perfect dodge counter will do.

This achievement is actually easier than it sounds thx to some apparent glitch. You don't have to throw around poor chickens and try to shoot them mid air. Just grab a chicken, and equip your bow with fire arrows. Lara will drop the chicken, it will fall on its head and won't attempt to run away. This will trick the game into counting the chicken as being mid-air. Just step back a bit and shoot it with a fire arrow, done.

This achievement was surely a pain, but its manageable. Ofc, you need a season pass that gives you The Endurance mode where this one is related. Pick some good cards to give you some advantages and make your life easier while trying to survive long enough.

Anyways, you can use guns to shot at those pressure plates to disarm them. They aren't really hard to spot due to being shinny and gold, unless you are running around like blind. Just walk carefully while aiming to get the job done. However, the problem is with those cursed weak floors that are hiding spike traps. You cannot shot those for some reason, because doing so ruins the challenge. They are so touch sensitive its ridiculous, even making a jump distant from them somehow activates them.

So, how do you manage them? When you see that a tomb contains these - simply turn around and never look back. Don't worry, there are plenty of tombs around the map, I've found at least 10 or 11 myself, its just depends how lucky you are with the dice roll to give you a spikeless one. They aren't hard to spot either, you can aim at the ground and when you see your aim turning red just run.

Risking isn't worth it, in my personal experience. No matter how many times I tried to make that jump I regretted later on. Even if you manage to go over some of them for being under some high spot, you'll stumble on some other that isn't. Or on your way back from the tomb you won't find those previously leaped over so easy to leap again. Be patient, search around for other tombs, you'll get it eventually. If nothing, it took me less time that way than all those failures for being stubborn.

That was the guide I wrote back in 2016, and after I obtained the achievement it was pointed out to me that something changed afterwards and people were able to shoot at the weak floors without invalidating the achievement. And indeed, I remember it was working without issues at the beginning, but after one of the updates shooting floor traps invalidated it, so after some patchings it was probably fixed. Some people also suggested that the tombs are reseting after a while, which should explain why there are so many to find and try your luck.

You need The Cold Darkness DLC (which comes for free if you have season pass), and this challenge selected before starting the game.

Its actually very easy with the right tools, particularly cards. You have Big Head Mode card (which makes everyone having big heads) and Big Head Enemies, those are pretty much self-explanatory. If you only have the first one which will make Lara's head big use it freely, that one was made to add a bit of score bonus in The Endurance mode, since you are also getting easier to hit, but here Infected are only melee units (with occasional suicide grenadier), so it won't make you some troubles.

I also used the card that adds 100% score bonus, and it makes Infected only killable by headshots and finishers (I got that one after my first The Cold Darkness playthrough), just to make sure I got the right kind of a kill. You have like 12 seconds window between each kill, shouldn't be too hard, Infected are spawning all over the place, especially if you make noises.