
Assassins Creed Unity Sequence 12 Memory 3 The Temple Germain Assassination
In this memory you have to fight the Templar Grand master Germain twice before finally assassinating him. Here's how you can kill him before that.
Finding Germain
At the beginning of the memory you have to infiltrate the place. The best route I could find involved an outside tower you jump from to reach the building housing the target. Half the time you get spotted by a nearby gunman, but even then it's minor. Also the jump could come up short, which is why I hold down the empty hand button to grasp the ledge (this doesn't work while you are falling, at least not consistently).
Throwing a poison bomb form one of the building towers, you can take out German's health, but it doesn't kill him. Also from another tower you can shoot him with ranged weapons, but they have no effect.
Now for preventing the scene from starting. Germain needs to be onscreen and not hidden behind a wall or object. So if you turn the camera away you can approach him and assassinate.
There are a few strange things that can happen, such as Germain becoming dead standing up, and even missing from the scene. Proof that he was indeed killed.

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In this video I show a few ways of killing Lafreniére that I though were pretty cool/interesting. This assassination takes place during sequence 5 in memory 3.
Puppetmaster
In this part I let the graveyard caretakers and their friends(green NPC eagle vision, who will help you if you kill the bodyguards before Lafreniére arrives, do most of the work for me. I throw a cherry bomb at a certain spot which will attract a couple of guards, the allies and Lafreniére . They will start fighting and shooting at each other and one of the allies takes out the target for me and I wait until the rest of the guards are distracted by the remaining allies who have heard the gunshots and have gone up from underground to investigate.
Then all I have to do is silently finish Lafreniére off for a completely unseen kill.
I dubbed it puppetmaster because I am sort of pulling all the strings from the shadows and didn't know what else to call it 
Blitz
This one is pretty straightforward.
I jump in the haystack closest to the target and before the wait timer is full I quickly jump out in the right direction so I can instantly drop a smoke and run to the target. The actual time it takes from spawning to killing Lafreniére is around 6 seconds, maybe even very slightly below 6 seconds.

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Assassin Creed Unity Assassinations: Sivert, le Roi des Thunes, Lafreniere, Rouille, Marie Levesque, le Peletier, la Touche.
Originally I had performed an accidental non-story assassination.
https://www.youtube.com/watch?v=aMGJdSF4oEs#t=253
After further investigation it was found that kills from crouching right behind low objects don't trigger the memory scene of targets. There are two ways to do this: Low profile, which is pulling them over the object and stabbing while they are still on the ground; and high profile, which is jumping out from behind the cover and air assassinating them.
When the game developers changed the situation of memory scenes starting to only hidden blade kills (the only lethal way to kill targets) the "crouching right behind cover kills" got left out.
Sivert
A "crouching cover kill" is possible behind the lift in both low and high profile. For the low profile one you have to lure the target to get close.
le Roi des Thunes
When fighting him, use staggering strike to get the target to a corner and parry his attacks. Sometimes he'll fall off the solitary platform. From (under)ground level there are tables and other low objects to non-story assassinate him from.

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Assassins Creed Unity Sequence 4 Memory 1 The Kingdom of Beggars la Touche Assassination.
In Arno's hunt for the King of Beggars he first meets la Touche, a Templar agent working for him. Although it was intended you spare his life and assassinate him later in the game, it is indeed possible to kill him without failing the mission.
Locating la Touche
At the beginning you have to find la Touche. This is the first opportunity to attempt an assassination. You can't get close to him without starting the scene, so I berserked a guard to go after him. Alas, la Touche can be targeted but not attacked. The poisoned guard stays there for the scene and afterward.
Another thing about the scene is you can use the disguise skill during the beginning and not lose it until the scene is partway done.
Tailing la Touche
Following the target, you cannot kill him without desynching. During this I show a short conversation he has with Marquis de Sade, who first appeared during the previous scene. At first I tried getting in the huddle of the conversation with a money pouch, but then the target walks past and the conversation gets skipped.
My attempt at getting away with an assassination at this part is to kill la Touche right as a scene is starting. This proved hard as either I would desynch or the scene would start before I could perform the kill. The closest I got was starting a low profile hidden blade assassination as the scene was starting. Arno continues the animation during the scene, stabbing midair. There is also no blood on la Touche, so I wouldn't count it count it as a kill. Standing by the entrance of the gate also gets Arno in the scene.
The Early Death of La Touche
Now that you're done tailing la Touche, all there is left to do is interrogate him to find out where le Roi des Thunes is. After that scene, la Touche remains shackled to the wall. He still has the regular guard AI, which allows you to lure him with gunshots and cherry bombs (gunshots are more effective, but be wary of other nearby guards who will be drawn to you).
Sometimes la Touche will lean over the wall when investigating. If he goes far enough you can target him for a kill. Depending how, the target will die on either side of the wall.

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Assassins Creed Unity le Peletier Assassination
I have two people to thank for this.
First Slembroccoli for the beginning route:
http://thehiddenblade.com/looking-future-again-thread-text-walls#comment...
Then InTehVaria for more on that route:
http://thehiddenblade.com/almost-perfect-minimalist-stealth-dinner-engag...
You start out climbing in through the open window near the poisoned wine. Go up the stairs and locate the target. If you're successful you'll hear him ask the butler for wine. Now go back out the way you came.
After climbing to the roof, make your way to the window infiltration. On the opposite side are some windows that are normally closed but open after you are in the same area as le Peletier. Ubisoft meant this as a way of escape after killing the target.

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I ended up changing things, scrapping my original plan because the route slembroccoli wrote out is much more efficient and it turned out my planned route had a serious flaw. The main run in the video is exactly what slembroccoli described here: http://www.thehiddenblade.com/looking-future-again-thread-text-walls#com.... It is indeed the best way of doing this mission in a minimalist fashion, which I think is pretty sad honestly. Regardless, awesome work, slembroccoli. I included my original infiltration route as well, after the main run, and I talk about its flaw in the video's annotations.
Happy holidays everyone.

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In this video I perform an eagle strike on Sivert.
I got Sivert at the intended spot using the luring technique that Aurel had used in his eagle descent video (Thanks for that btw made it a lot easier). After getting him out of the Notre Dame it was mostly an issue of avoiding the NPC's that are green when eagle vision is active since they will attack and kill Sivert. Blue guards should also be avoided since they will also attack Sivert and similar to my other video there is a chance that Sivert will disengage from combat completely and cannot be aggro'ed anymore.
About the jump, you will probably notice two things:
- I'm positioning Arno to lean slightly to the left when hanging from the ledge, this is because a straight jump forward will most likely take him to far and I would die on the roof.
- At around 1.17 there is a slight skip/slow/glitch in the jump, I don't know how to cause this but it occurs most of the time when leaning to the left and having the camera at a certain angle. I've performed the jump without the skip but the chances of success are a lot higher when it happens.

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Assassins Creed Unity le Roi des Thunes the King of beggars. This assassination takes place in sequence 4.
Pacifist
Only use the knockout ability. To remain anonymous I had to take out two other guards. Stealthy, except for when the target spotted me for a brief moment. The game requires you to kill the target with the hidden blade, but strangling him first helps with the idea of a mercy killing.
Pummeled
The closest thing to a punching bag. Sneak up, unsheath your weapon and beat him to a pulp.
Employee of the Month
Killed by one of his own. Berserk the gunman on the other side of the room. Make sure you kill him right after he shoots the target or he will detect you after that.
Jump Kill
A mini stunt from the highest available beam nearby, using a cherry bomb to make the target face away.

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While toying around I stumbled upon a certain glitch.
I've taken the liberty of coining it "Ultrablending" since I remembered the terms super and hyperblending being used (although I have to admit I'm not entirely up to date on how those exploits work
).
So basically this is what you do for the glitch to happen:
- First, you find a group of npc's similar to this video, I would guess that a crowd of 5/6 people is enough and you don't want to get overcrowded.
- Then you go stand in the middle and drop a money pouch using R1, the npc's will start picking up the money and Arno will crouch along with them, I wait a few seconds and then I slightly nudge my control stick to make Arno stand-up.
I try not to make very abrupt movements and try to take a few small steps and if all goes well you should see the blending circle/ring disappear and re-appear a couple of times.
- I don't know the minimum/maximum off re-appearing the ring has to do and I usually just take a guess and step out of the blending group.
- I usually test if the ultrablending has succeeded by running past a few guards/fanatics and see if my running makes them turn around/activate their SSI. If I failed then they should notice me and if I succeeded they wouldn't even turn their heads.
The money-bag process is a bit of hit and miss, up till now I have a 70-80 percent success rate on the first try.
The glitch doesn't cancel out when you fast-travel to a viewpoint if I'm correct. It does however end when you die and I also think it ends when you enter another blend group.
Entering a main memory after ultrablending will cancel it out and that's why I had to redo it for the assassination.

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Using the underground entrance as a way to turkey shoot (immobilize) the target.
Sequence 3 Memory 2 Confession
The underground entrance is on the south side of the building, near the back. On the wall is a strange symbol you can interact with. This same symbol is also by another underground entrance, the one by the front door. A large trap door is the opening inside Notre Dame.
Start by clearing the area of nearby guards who could spot you. Then get the target's attention and lead him to the stairs of the underground passage. I tried using dead bodies and cherry bombs to get him all the way underground, but they didn't work so good, so I resorted to using smoke bombs+tackle.
Once he's in there close the trap door. This isn't necessary to prevent him from moving because the AI of characters can't find a path to or from the underground entrance and the inside of the church.
To reach him from outside, go through the underground entrance nearby, the well. With Sivert being a sitting duck, you can sneak up and turn him into a human pinata with a melee weapon. A smoke bomb makes this more effective if you don't want him to try to fight back.