Dying Light

This achievement is for saving 15 survivors from Rais's men in Harran.

As travel through the map, you will frequently encounter random events as seen in the video below by a flashing blue circular marker (shows up on minimap).

These markers can mean a number of things and are not always for rescuing a survivor from a Rais's men. They may also be for a street fight with two enemies, a rescue from a zombie or a random shop to buy and sell items.

Please note: this particular event seems to show up A LOT less frequently in the second area, once you leave the slums (Thanks RellikGod for the suggestion). I have also found this, and have used the fast travel map in the tower to head back to the slums to continue work on this achievement.
This particular event also shows up a lot less frequently once the game is complete (thanks Bleach XBA and Icromatiickzz).

*NEW TIP FROM Zaro Karos AS OF MAY 2021*
"I ended up restarting my save each time up till the Rais quest and the first encounter and was getting them faster and more consistently for the remaining 6. Not sure if something changed or what but looking at the unlock percentage this shouldn't be this difficult."

The counter appears to be glitchy as I have rescued 17 survivors and still says 73%. I have been checking each time I rescue and have not seen it go up since before I reached Old Tow. I would suggest trying to complete this before moving to Old Town.

For this achievement, we need to be rescuing a survivor from Rais's men. This random encounter can come in several forms. My video below shows me rescuing two survivors and being attacked by four of Rais's men. I have also encountered one survivor and three of Rais's men - this is much more common.

For those of you who have the following DLC, Warboy925 adds this helpful tip:
"You can also get this achievement in The Following......only difference is that I find its a lot easier!!

Just drive around and when you see a blue icon appear, if it is a rescue, they will say over the radio something like, "They are here to desecrate the altar, help me brothers!", or "The bandits are here, I need help"...........just know that the blue icons that indicate a rescue ALWAYS has a radio message asking for help!! And they are ALWAYS by an altar!

(Yes blue icon vendors and hunting tower zombie "rescues" have radio messages too, but it is easier to tell which event is which depending on the radio message")

Hunting Tower rescue (From Zombies) ALWAYS say "Hunting Stand", or "Hunting Tower" in the radio message, and vendors are pretty obvious with their message......"
Thanks for the tip!

TIPS:
- Use a gun! Using a gun makes this much easier as you can easily take down enemies at a distance. However, if you do not have one yet, see below for melee techniques.
-Take lots of medkits with you whenever you leave a safehouse. You never know when these random encounters will happen and it always pays to be stocked up in case you mess the fight up.
-Use your strongest weapon against Rais's men. They are very good at dodging and kicking.
-Dodge! These encounters are much easier if you are able to purchase the Dodge skill. It is the first skill you can purchase in the Agility Skill Tree. Use to Dodge when the enemy is about to attack, and you should be able to get a few hits in before they recover.
-Kick! Often a kick using can interrupt an enemy attack leaving him open for a counter attack. However, some attacks cannot be interrupted.
-Fight dirty. Often when you come across one survivor with three of Rais's thugs, there will be one sitting down. Always take him out first as you can easily take him out before he gets up, and before the others have a chance to attack. This instantly evens the odds to 2v1.
-There is usually at least one in the group who can sit back and throw knives at you, so try to take care of that guy early too

My video showing a 4v1 fight, rescuing two survivors:

These is my own video I uploaded from my own gameplay.

I've found a good way for this achievement, It's some kind of route on the map (Slums) that can easily spawn these ''Rescues''. All You need to do is reach the fourth main-mission named Pact With Rais and then keep completing the objectives till you reach the objective ahead : Find a Telecommunication Antenna. Here you can stop doing the mission !

Now, what you need to do is to keep walking the route on the map below showing the possible respawn points on the map!

Big Red Circle = Keep walking through this area trying to find the ''Rescue'' over and over again till 2 airdrops come. (The first airdrop comes right after you sleep and wake up , and the last one comes tonight, what means that you can go to the safe zones marked on the map and sleep again because after that won't be more ''Survivors Quests'').

Stars = These are the locations that appeared more rescue missions on my walk through this achievement.

Map:


NOTE: When you find the rescue missions complete it. Then when appear your survival exp increasing quickly press after that quit the game ! When you restart it, there'll probably be the same rescue at the same place you did before. (Keep eyes on your achievement progress, if you don't worry, let it snapped)

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Hope It Help you guys !

After finishing the game I still needed 6 encounters. I started a Ng+ and found a really sweet trick that should work anytime you have the location of one of these encounters. The key to this method is remembering the location of the encounter and the path that you took. The steps you need to take are:
1. Find one of these encounters and make sure you remember its location.
2. After completing it and collecting your reward immediately hit the guide button and quit out of the game from the dashboard.
3. Start up the game again and it "should" start you somewhere near the encounter.
4. Go to where the random encounter was and it'll be there again. Repeat step 2.
*5 The encounter will always be in the same exact spot but if you don't run the same path, you run the risk of having another encounter popping up nearby. If this happens then immediately dashboard and restart.

Hopefully this makes sense and I'm here to answer any questions. It took me just about 10 minutes to get my 6 encounters done and that includes running into 2 other encounters that made me restart. I wish you all luck and hope that this was helpful.

***for people who have already cleared the game***

Chapter select.
-pact with reis.
Continue in the mission until the task is to find a telecommunications device.
-around the apartment complexes between the nav point and reis' compound, run around until you find his goons homding someone hostage. Complete the event. As soon as the autosave finishes, quit the app and restart the game.
Continue and you will start at the compound again. Go back to the same general area and you'll quickly find them again.
Rinse and repeat.

This is confirmed. I did this method after spending hour and hours searching in old town.
I got the last five i needed in 20 minutes.

I have not unlocked this achievement as of this post. but have increased the number i have found by this..

Try to finish this before you and Rias really go at it..
The "Random" Events are spawned after the air drop in the morning, and night.

So 8 - 10 am, and shortly before night fall. 8-10 PM

The events are :
Blue money man
Blue guy who talks
Rias 2 guys searching a car.
Guy being attacked by zombies.
And Rais guys attacking blue guy. (seem to appear NW / W ) North slabs / west side of rail yard. (slums)
Later Rias guys will be replaced by blue runners..

they seem to be 1 a day, and you will get one of the above. the further in the story you are the less likely the last will show up.. until you reach old town.

I had already finished both main & DLC stories and still needed to rescue 5 or 6 survivors from Rais's men, but I still needed to do all 10 parkour fever challenges, so I decided to wait until I was done with those just in case I met one or two while practising my runs.

So I was playing with my game at 100% (NOT NG+) and I found that in the new area (Old Town) there are random encounters popping all the time. Not all of them are surviviors being held by Rais's men, but I did manage to find all the encounters I needed (and then some) before finishing the 5 Parkour Fever challenges in Old Town.

So even if you're done with every other achievement, it might be a good idea to just run around Old Town for a few day cycles until you find all the events you need.

In any game day, only one encounter of each type will pop (but not necessarily all of the types will pop), so if you already saved a survivor from Rais's men on a given day, you'll need to go to sleep until the next day for a chance of saving another one. However, if you found an encounter of a different type, there is still chance to get the one you need. There are no events at night.

Also note, if you are working on your parkour fever challenges and you're about to start a run and see a random encounter pop, check it out before starting your run, because some encounters disappear when you start the challenge.