Fists of Fury: Novigrad
Prerequisite: None | Suggested Level: 23
Check out the Notice Board in Hierarch Square to learn about a fighting ring in the city. There are three brawlers to face: Georgius Georg at the Golden Sturgeon, Archibald O'Neill in the slums, and Iron Mortimer near the Oxenfurt Gate. After besting all three, you'll be able to face Durden the Tailor in Farcorners. Win this final fight to end the quest.
Following the Thread
Prerequisite: None | Suggested Level: 11
If you check the notice board in Hierarch Square, you'll learn of a string of murders happening in the small cluster of homes by the Tretogor Gate. Head to your marker and speak to the guard there to learn a bit more about the murders.
Head to the next marker - it's inside a small home - and use your Witcher Senses to find some clues and some tracks. Follow the footprints to the edge of a dock, then hop into the water and swim to the shore across the way. The prints will lead into the building on the other side of the water. Follow them to the top floor, where an old friend, Lambert, will be battling the murderer: an ekimmara. Slay it, then return for your reward.
After a cut scene, Lambert will run off, leaving you to deal with some guards. Take them out, then head inside the nearby building. After another quick scene, you can head off to meet Lambert at a nearby inn. Once you learn what's going on with him, you'll head inside to meet with a friend of his. A bar brawl will ensue, and you'll then be tasked with tracking down another one of Lambert's associates.
When you reach Skellige, you can find the man, Hammond, in Trottheim on the island of Faroe. This is essentially one big slaver camp, so be prepared for a battle if you misspeak at the gate. You can then find your target at the shrine on the eastern edge of the island, but be prepared for another fight with his men when you do. Loot his corpse after the fight and read the letter you find, then head all the back to the Nowhere Inn in Novigrad.
It's finally time to take Lambert's man Karadin down. Head to Gildorf and deal with him as you see fit. This will finally wrap up this globe-spanning quest.
Contract: Doors Slamming Shut
Prerequisite: None | Suggested Level: 24
Grab this contract from the Notice Board in Hierarch Square, then head into the nearby Kingfisher. In here, you can speak to Count Kurt Dysart, who owns an estate he believes to be haunted.
Head to your new marker at the Moldavie Residence to check it out. Head inside and use your Witcher Senses to examine any red-outlined objects. When you reach the basement, use Aard on the crumbling brick wall to find a hidden cave beneath the house. There's also an ancient locked door. Hop in the water and swim east to find a lever to open said door, then return and head through.
Beyond is an Earth Elemental named Thereazane, trapped in a magical bond. Use Aard on the pedestal behind him to break the bond and start a battle. It won't be that tough, but the Elemental has very high defense. Once you've whittled it down to size, return to the Count for your reward.
An Elusive Thief
Prerequisite: None | Suggested Level: 13
Check the Notice Board in Hierarch Square to learn about a "thieving imp" in the area. Head to your marker in the marketplace at some point during the daytime to speak with Sylvester Amello about this. Ask him a few questions about the thief, then use your Witcher Senses to spot some tracks.
Follow these up to and across part of the nearby bridge. You'll have to leap into the moat and paddle over to the eastern shore to continue on the path. This will lead you inside a house. Grab the letter at the end of the path and read it to learn what you're dealing with: a doppler.
Now head upstairs and use your Witcher Sense to find a strange pile of clothes. This will reveal a red scent trail; follow it to reach the culprit, currently disguised as a guard. Chase him down, and he'll morph into… you! Best this quasi-Witcher in battle, and you'll have a choice to finish him off or let him go. Either way, you can return to Sylvester for your reward.
Message from an Old Friend
Prerequisite: None | Suggested Level: N/A
There's a bookseller named Marcus whose store can be found in Hierarch Square. Speak to him, and he'll recognize you and mention an "old friend" left a book for you. Use your Witcher Senses to find it on the second floor by the steps to the third. The book will have a letter inside; read it to complete this quick quest.