This guide is made with the intent of helping with any achievements you may missed or have struggles with. This guide does not help getting the speedrun challenge.
Before you get any achievements you should do these things first to save time

-Complete all mission on hard mode, you wanna have it done before doing the rest. It also helps to learn maps and characters with it.
-Collect all skill upgrades and do all optional objectives, to save time on upgrading the skill to max level.

These will be unlocked when playing through the story, I only wrote this section to have all achievements in this guide.

Löwenfels Castle
Beat the Löwenfels Castle level

Hey, Sis!
Isabella Sterling reluctantly joined forces with her brother




Lilleby
Beat the Lilleby level

Acerbic Personality
Rosa Reznick agreed to help stop that fool, Kammler

Can Opener
Kill your first Panzerwolf

Madinat Aldaala
Beat the Madinat Aldaala level

Bear with Me
Wojtek Galica and his beast joined the Enigma Squad




Al-Bhutan Oil Depot
Beat the Al-Bhutan Oil Depot level

Daddy Issues
Alistair Sterling decided to join the action in person

Ghost Buster
Kill your first Geist

Prototype Testing Site
Beat the Prototype Testing Site level








Gis-Eren
Beat the Gis-Eren level

Face Your Inner Demos
Siegfried von Adelsberg received a (somewhat lukewarm) welcome back to Enigma Squad

Apage Satanas
Kill your first Demon

Kammler's Secret Base
Beat Kammler's Secret Base level








Kammler's Underground Complex
Beat Kammler's Underground Complex level








Site of Sacrifice
Beat the Site of Sacrifice level








Where is Your God Now?
Hans Kammler has been defeated - for good

There is not much to talk about these achievements.

Lieutenant
Beat all missions on any difficulty level





General
Beat all missions on Medium difficulty or highe




Field Marshal
Beat all missions on Hard difficulty

You will probably unlock these achievements when doing the rest.
(unlocking all upgrades will require to replay a few mission because there aren't enough crates)

I Want my Scalps
Kill 100 enemies

Stamp 'em Out
Kill 500 enemies

Kill All Nazis
Kill 1000 enemies


A New Challenger Has Appeared
Complete your first Challenge

Challenge Accepted
Complete 10 Challenges

Hardly a Challenge
Complete 30 Challenges

You Dare Challenge Me?
Complete all Challenges


Enigma Squad Certified
Fully upgrade All Skills

These are the achievements you are probably reading this guide for.

Gorge of Eternal Peril
Launch an enemy into a chasm

For this one you only need to launch an enemy down a cliff/out the map.
You can easily do this in the mission where you unlock alistair.

A good spot for it is at the start in the area with the crane, just clear it of any enemies except the one soldier who patrols at the cliff. Place the launch pad at this location and wait till he walks over it.







Nothing to See Here
End an alarm by killing every enemy in the area

Very easy to do in missions without an Alarm Station and on easy because your team has more HP
Just trigger an alarm and then kill everyone until the alarm ends.









That's not up to Code
Kill at least 5 enemies with a single environmental kill

This can be done in Site of Sacrifice on the side with sid, rosa and alistair.

1. get through the garden until you reach the path with the wagon.
2. clear all enemis till you reach the wagon.










3. use disperse on this soldier and use stunning link on him when he's on the path.












4. push the wagon with sid or alistair when the panzerwolf is on the path.
(4.5 the panzerwolf will move off the path if not fast enough)

I hope this guide was helpful. If there are any mistakes or things I missed please let me know. English in not my main language, so apoligies for any garmmatical errors.