Shadowrun Returns

I want to try a more detailed guide because this achievement is particularly annoying, to the point that you kind of need to dedicate a partial run to getting it. TLDR:

• Build a human custom character and pump all karma points into quickness/ranged combat/rifle
• Get as much karma as you can (link to karma list provided)
• First doable during Return to the Docks,
• Kill key holder first, pick up key
• Do final level up for headshot
• Headshot mage, get 2x crit
• Reload until successful
• IMPOSSIBLE DURING FINAL BATTLE

First off, none of the teammates in the game have any skill levels of 7 or higher (even 5 and 6 are rare too), so this and some other skill-based achievements will have to be done by your player character. You will need 83 karma to get the headshot skill (28 per skill line, minus 1 automatically allocated in the base skills). I believe preset archetypes don't start with more karma, they just have some pre-allocated, so you'll want to go custom to bank everything into getting this skill. Humans get more karma to start with (I forget if it's +1 or +3) and can go up to 9 in all skills, so I'd choose them when going for this kind of achievement. Here is a list of most of the places you can gain karma in the game - https://steamcommunity.com/sharedfiles/filedetails/?id=12707... (I think it's missing a couple but it gets the job done).

When you get a crit in this game, it will do either 1.5x or 2x damage (don't know if there's a way to increase the odds of getting 2x). The first two rifles in the game do 10 base damage, so the most amount they can do on a crit is 20 (the next two rifles aren't much better with a base damage of 12). The lowest health that I've seen for any enemy in the game is 20, with the majority of them being 30. This is what makes this achievement especially annoying, there are already so few opportunities to get this achievement that you then miss out on because you're probably trying to run a more balanced build and don't have the points for headshot.

Assuming you do every single karma action and save them up/spend them entirely on leveling quickness/ranged combat/rifles, the absolute earliest you can get this skill is during Return to the Docks, immediately after picking up the key to the warehouse. Conveniently enough, this is also the first place you can get this achievement. Make a save after dealing with the lookout, then try to prioritize the guy with the key (for me, he was always the thin brown jacket with the rifle that shouts at the beginning of combat, but it might be randomized). Once he's dead, pick up the key with one of your teammates. You now have enough karma to get headshot and, interestingly enough, you can level up during combat, so do so. Then, with your player character, immediately use headshot on the hooded human/elf mage with the pistol. If you're lucky, you'll get the 2x crit for 20 damage and subsequently get the achievement. If you get the 1.5x crit or miss and don't want to wait for the cooldown, reload and try again.

If you don't get it this encounter, two more places I've found this doable are another mage inside the warehouse and a surgeon and mage on the bottom floor of Mercy Hospital. After Mercy Hospital, I believe the Colt M23, which does 15 base damage, becomes available for purchase. This makes it possible to get this achievement on 30 health enemies, but a lot of enemies have at least one point of armor at this point too. Armor will reduce the damage done even on crit, so bring along a mage that can strip armor too.

ABOVE ALL, make sure you get this achievement before the final battle. the lowest health I saw for anybody in the final battle was 40, and the highest damaging rifle, the Ares Alpha, is 16 base, which means it is IMPOSSIBLE to get this achievement at this point in the game.

One of the latest skills called 'Headshot' available in Rifles skill. For that you will need to spend your Karma on Quickness, Ranged Weapons and Rifles. After acquiring needed skill just kill an enemy with full healhbar, best to do it on mages since they have only 20 hp. I was able to do it on a mission in