Before delving any deeper into the guide / checklist, you need to know the following information.

• To achieve 100% completion on a save file in Dying Light, you will need to complete or do a few tasks in certain DLCs. More information is available in the DLCs subsection.
  
• Collectibles are 100% optional, not affecting the percentage of completion.
  
• Several quests and challenges are bugged, where the case may be needed to highlight such quests / challenges due to bugs, i will bring it up.
  
• Although The Following is a game-sized DLC for Dying Light, the main game is completely stand-alone from The Following, thus reaching 100% completion is not necessary for The Following and neither is playing The Following a requirement for getting 100% completion.
  
• Each of these sections can be done in co-op or singleplayer, but it is recommended to do it in singleplayer to avoid bugs or network issues.
  
• As time passes, the guide will be updated to feature photos, more indepth explanations and many other things, as it is now at the date of (3/7/2022) the guide is a bit barebones, being mostly comprised of text.
  
• If there are any questions or suggestions, leave them in the comments and I will do my best to try and answer or update the guide accordingly.
  
• This guide may have spoilers, and they WON'T be marked. Thus, this guide should only be followed after completing the main story.
  
• Guide version is 1.1, Changelog is available here.[pastebin.com]

Taking all of the above into account, time to start off the checklist.

Dying Light has 15 Main / Story quests. Each one is mandatory for game completion and save file completion. Starting from First Assignment and ending with the beginning of Extraction, each one is doable in co-op, although for the purposes of this guide, its recommended to do the quests individually to avoid any problems that may arise from co-op.

The following Main / Story Quests are needed for 100% completion:

• Awakening
  
• First Assignment
  
• Airdrop
  
• Pact with Rais
  
• Siblings
  
• The Pit
  
• The Saviors
  
• Find the Embers
  
• Higher Education
  
• Public Face
  
• Rendezvous
  
• The Museum
  
• Broadcast
  
• The Clinic
  
• Extraction

There are 52 Side Quests in Dying Light. Each one is mandatory for 100% completion. Some quests are bugged and do not update / track accordingly after completion. Those outliers will be marked and expanded upon where it is needed.

The following Side Quests are needed for 100% completion:

In the Slums:

• A Baby is Born *** :
  This quest may present issues in showing up, you will be able to receive it after exploring close to the tunnel inbetween the Infamy Bridge and Brecken Tower, Crane himself will point out that he heard a woman screaming, afterwards you are able to investigate the quest.
  
• A Survivor's Guide to Zombieland
  
• Bandages and Meds *** :
  This quest will replace any gauze you find with Syringes and Painkillers. Until it is completed, obtaining Gauze may prove to be difficult.
  
• Binoculars *** :
  A spot where Binoculars are guaranteed to be found is the Antenna Safezone nearby.
  
• Cease and Desist
  
• Coffee
  
• Crayons for the Kids
  
• Dulse
  
• Electronic Parts
  
• Firebug
  
• Gas Mask Man
  
• Gassed Up
  
• Goodnight Mr. Bahir
  
• Gunslinger *** :
  A pistol may be found easily immideatelly south-east of Brecken Tower in a house with a sign saying "Take anything you want"
  
• Incense Herbs *** :
  Incense Herbs are found due north of where the Barge is, on 3 little islands. Use survivor sense to have an easier time finding them.
  
• Lighter Gas *** :
  Light gas commonly spawns inside of wardrobes and baskets.
  
• Midnight Bride
  
• Mother's Day
  
• O Brother Where Art Thou?
  
• Poisonous Herbs
  
• Searchlights
  
• Spare Glasses
  
• Steal from a Thief
  
• The Big Bang Thesis
  
• The Prodigal Son
  
• Total Security
  
• Tunnel Vision
  
• Voltage
  
• Where's My Mother?
  
• On the Hooks
  
• Assault and Batteries
  
• Hardware
  
• The Launch *** :
  Depending on the point you take this quest, you may miss it. This quest doesn't fit in either Sector 0 or The Slums, as it takes place in the "Antenna" (The area where the "Broadcast" quest is done.), if you do it after doing Broadcast, it won't be trackable until you visit The Antenna again, so once you finish the above 3 quests (On the Hooks, Assault and Batteries and Hardware) visit the Antenna. The Antenna is accesible from either Sector 0, or The Slums.
  
• Witch Queen *** :
  This Quest is one of the more notorious ones that may seem bugged. Once you receive Dahlia's Shroom Potion, consume it immideately once you leave the Safezone. After your high is over, return to the same Safezone where she is to proceed onto the next quest,
  
• Hunting Goon *** :
  Same as the quest above, except you need to bring her a Goons Liver. If you cannot find one, the game will mark one on the map for you. Once you receive Dahlia's Liver Potion, leave the Safezone, consume it, and when the aftereffects are over, return to her to proceed with the next quest,
  
• Kidney Punch *** :
  Just like the 2 quests above, repeat the same steps. Just like before, if you cannot find a Bomber, one will be marked on the map for you. Bring her the desired ingredient, consume the Kidney potion ASAP, then return to her when the prompt is given. This is the 2nd to last quest given by her, the last being:
  
• Bring Me the Brain of Usain Bolter *** :
  Bring her 1x Bolter Tissue, and get the cloak potion. After picking it up, you don't need to consume it, as the quest will complete after picking it up.

In Old Town / Sector 0:

• Blocks for the Boy
  
• Chasing Past *** :
  Others may have issues with this quest. It is received from the North-most Safezone in Sector 0.
  
• Do You Believe?
  
• Dungeon
  
• Fan Zone
  
• Fountain
  
• Health Potion
  
• Legless Spider
  
• Lost in Space
  
• Office Outpost
  
• Radio Station
  
• Rupert the Gunsmith
  
• The Bunker
  
• The Shadow of the King
  
• Troll

Aside from the main story and side quests, Dying Light features a number of various challenges, this section looking specifically at the Parkour Challenges.

The following Parkour Challenges are required for 100% completion:

In the Slums:

• Twister
  
• First Assignment
  
• End of the Tunnel
  
• Favela Fever
  
• Tiptoeing to Gazi
  
• Family Doctor *** : Only the first part of this challenge is available in the Slums.
  
• Jealous Runner
  
• The Best Runner *** : Only the 1st, 2nd and 3rd parts of this challenge are available in the Slums. Likewise, the challenge doesn't show up when far away from it. The challenge giver is located close by the Brecken Tower, inside of a shanty house.

In Old Town / Sector 0

• Blue District Fever
  
• On the Edge
  
• Not so Obvious *** : Challenge pops up only when close to it. It is located in the North-east of Sector 0.
  
• Tower Run
  
• Diagonal Run
  
• Light at the End of The Canal *** : Closest category this challenge would fit in, not entirely sure if it's needed for 100% completion.
  
• Underwater Light *** : Closest category this challenge would fit in, not entirely sure if it's needed for 100% completion.
  
• Family Doctor *** : The remaining 4 parts of this challenge are done exclusively in Sector 0
  
• The Best Runner *** : The 4th and 5th parts of this challenge are done exclusively in Sector 0, with the Grapple Hook being disabled and the challenge being failed on any damage taken.
  
• Being a Hero
  
• Bozak Posters: Agility
  
• Run for Your Life

Just how there are Parkour challenges, there are also Power / Combat challenges that focus all around combat and unique ways of handling enemies.

The following Power Challenges are required for 100% completion:

In the Slums

• Psycho
  
• Killing Guide
  
• Dying Lunch
  
• Ultimate Weapon *** : Only the 1st and 2nd parts are available in the Slums.

In Old Town / Sector 0

• Ultimate Weapon *** : The 3rd, 4th and 5th parts are available exclusively in Sector 0
  
• Bozak Posters: Power *** : The Hunt Volatiles challenge can only be done during the nighttime.

The last bit of content required for 100%-ing Dying Light are Quarantine Zones. Although these may not appear to be "Complete-able" they are indeed completeable. Quarantine Zones have no indicator if they were completed atleast once before or not, so either you will have to do them by memory, or keep track of them on a piece of paper / spreadsheet.

The following Quarantine Zones are needed for 100% completion:

In the Slums:

• Bright Mountain Tunnel *** : Not to be confused with the Holy Year Tunnel Quarantine Zone, which is added by a DLC.
  
• Chemical Storage
  
• Stuffed Turtle
  
• Sunny Apartments
  
• Underground Parking *** : Caution should be taken, as this is the only Quarantine Zone that has a meaningful danger. There are ~5 Volatiles patrolling inside.

In Old Town / Sector 0:

• New Antalya Apartments
  
• Parking Lot *** : Not to be confused with Underground Parking, which is a Quarantine Zone in the Slums
  
• Striped Dragon Hotel

Dying Light features a couple of DLCs that are required to be completed / visited to achieve 100% completion. These are the Harran Prison Heist (Free) and Hellraid (10$ when not on sale.). Although these are the only DLCs that are confirmed to have an impact on save completion, another Paid DLC may be needed to avoid a bug where save completion is stuck at 99%. The Bozak Horde is said DLC in question. (In my case, i had 99% save completion before visiting the Arena. After visiting the Arena where the Bozak Horde takes place, my game completion went to 100%). With that being said, this is everything you will need to do in the 2 (3) DLCs to achieve 100% game completion:

The following Quests in Hellraid are needed for 100% completion:

• Clavis Stones
  
• Imprisoned
  
• Beneath the Seals

You must visit:

• The Harran Prison atleast once.
  
• Optionally, in case the completion bugs at 99%, visit The Bozak Horde Arena.

Due to the fact that the Hellraid and optionally, Bozak Horde, may be needed for 100% completion, this means if you wish to achieve 100% completion you may need to buy both DLCs and do what is mentioned above.

Unfortunately, some users run into an issue where the game displays the progress being capped at 99% and there isn't a sure-fire guaranteed way to get fully 100%, others have gotten it solved by running around, exploring, and doing other ingame activities, which at random seem to have increased their completion from 99% to 100%. Personally i have had this 99% bug happen to me too, and i was able to solve it by playing the Bozak Horde introductory cutscene, then leaving the arena. If you are stuck at 99% progression and seemingly nothing you do helps, try visting the Prison Island atleast once then leaving, and playing the Bozak Horde cutscene atleast once then leaving.

Rounding things up, those are all of the needed Quests, Challenges, Quarantine Zones and many other activities needed to fully 100% Dying Light. If you found this guide useful, feel free to leave a comment and a rating. Credits go to u/Vrbexx on the r/dyinglight subreddit for helping confirm DLC content and collectibles aren't a necessity for completion.



Good night, Good luck.