Maverick
Survive 2 minutes within a Danger Zone.


It's been suggested that the best time to do go for this achievement is as early as possible or right after you rescue the LZ. At the beginning of Lifeline you will have 2 well-equipped companions to make this achievement a bit easier.

After rescuing the LZ, head northeast from the base until you reach a graffiti wall.



Go left from this wall to see a fence that you scan climb past to reach a danger zone. Just hang around the very edge of the danger zone for 2 minutes and this achievement will unlock.



Huge thanks to Commander Andrew for the tip!

Ursprungligen skrivet av Jepp:

Basically it involves taking a car into the Danger Zone, because cars are OP. http://imgur.com/a/sCr2c

Flugtag
Send an energy drink flying.


On the southwestern part of the ringroad, there is a ramp with a large can situated on top of it.



Just ram it with your vehicle to send it flying for an easy achievement.


Thanks to RAWGER for mentioning this tidbit!

There are a few other locations where you can find these large cans but this is one of the closer ones. Thank you Jepp for mentioning this.

Rucks in Trucks
Deliver 6 rucksacks to your base in the back of a single vehicle.



Vehicle storage is a new feature added along with Lifeline. You can do the achievement in one go. If not, just make sure that it's the same vehicle you are using to bring back supplies on subsequent runs. Keep in mind that to deliver the supplies while in your vehicle, you have to drive to the side of the base and look for an open area where you can park your vehicle close to the gate.



As pointed out by Jepp, this achievement only works in the Lifeline DLC.

Under Siege
Survive 10 sieges on your base in a single playthrough.


You need to postpone the final mission (the choice between Sasquatch or Vienna Cho) so that sieges can still occurr. Basically don't pick either one until you've confirmed you have the achievement for 10 sieges.

A siege happens soon after reaching threat level 3. You'll have hordes of enemies attacking your base from multiple directions (of which you will be notified). A few things that help with sieges are the 3 types of traps you can restock regularly, a decent supply of vehicles, and combat specialization skills (heavy weapon's spin is great in this type of situation).

Edit: It helps if you pre-loot for resources and search for grenade launchers before saving the first asset -- Dr. Horn. Pre-build your base as well so that you can create stims, painkillers, and grenade launcher ammo. I managed to get 7 grenade launchers before continuing with the story. This guide has some of the locations of the Grenade Launchers. Results may vary as the # of GLs you get depends on RNG as well. Once you have your GLs, progress the story until you get to the first siege so that you now have access to the other community members and equip all non-active ones with GLs. They have unlimited ammo so they will essentially make your base nearly invincible during siege times.

While most of your GL Joes/Janes will do the bulk of the zombie culling, equip some grenades on your active character too. They work just as well, aren't as heavy, and you'll have a large stock of them if you've followed the advice above and pre-looted the area before continuing the story. Just make sure you use them past siege #4 and onwards since the earlier sieges are easier.

Freak Hunt
Complete all Sasquatch hunting missions.


After progressing the questline a bit, some annoying guy named with the callsign Sasquatch will butt into your radio frequency. He'll ask you to cover his ass and in doing so, recruits him into your base.



Once recruited, he'll have some escort-type recruiting missions for you. These will involve special infected and you will have to kill each one a certain way.

• Bloaters - kill with a headshot (so it does not explode)
  
• Feral - kill with a regular attack from an edged weapon/blade (executions will not count)
  
• Screamer - kill with fire
  
• Juggernaut - kill with any weapon you can swing around (blunt/edge)

Wired for War
Kill 100 zombies with Drone Strikes.


After you lose contact with HQ, you lose most of your radio calls. In order to get Drone Strikes, you'll have to establish an outpost on the appropriate amount of Drone Trailers.



The one I got a Drone Strike from was in the very northern part of the map. Jepp has pointed out that getting a Drone Strike may be random or that it may be from getting a certain amount of trailers as outposts.




Once you have it, radio in for a Drone Strike to gain a grenade that serves as a marker for the Drone Strike.




The grenade will attract nearby zombies to it just like a whistling box mine. Now all that's left for you to do is pick a spot with a high zed concentration and the rest is cakewalk! I personally prefer the danger zones just for a little bit of excitement.

These next 2 achievements are alternate ending achievements. One is for triggering the nuke and one is for disarming it. If you don't want to play through the entire DLC all over again, I suggest making a copy of your save folder.

It should be located at:

C:\Program Files (x86)\Steam\userdata\xxxxx\241540\local

War Never Changes
Survive detonating a nuclear device in Danforth.


Sometime after completing Sasquatch's escort missions (the last one is a Juggernaut hunting mission) and progressing the story a bit, you'll get a mission to find Sasquatch. He has gone missing and can be located in the same area you first found him at.



As you can see, he's gone nuclear and he now holds the fate of Danforth in his hands (or heart).

At any point after escorting him back home, you can ask him to detonate the nuke. You'll have to survive one final siege before you can evacuate safely and get the achievement. Keep in mind that you have to call for the final extraction via the radio tower.




Last Voice of Danforth
Escape Danforth with Vienna Cho in your community.


After rescuing enough civilians (the ones broadcasted by Vienna), you will have the opportunity to save Vienna Cho. Successfully saving her will bring her into your community. Unfortunately, she will refuse to evacuate after finding out about Sasquatch and his nuke. You will have to help her disarm the nuke in order to get her to evacuate.

Edit: Vienna Cho can leave your community if you fail to make her feel safe. She left my community after I tried to rescue a refugee and got killed in the process.