Gatekeeper
Gatekeeper was a virtual representation of one of Ezio Auditore's genetic memories, relived by Desmond Miles in 2012 through the Animus.
Description
Ezio Auditore arrived at the barracks to discuss plans to take out the Baron de Valois with Bartolomeo. However, in the middle of their conversation, the French mounted an assault on the barracks. Bartolomeo, his mercenaries and Ezio successfully defended it. Upon fending off the French attack, it was revealed that the Baron had kidnapped Bartolomeo's wife, Pantasilea, and was using her to secure Bartolomeo's surrender. Ezio and Bartolomeo then rode off to inspect the French camp.
Dialogue

As Ezio walked through the front gate of the Barracks, Bartolomeo drew his sword and turned around.
- Bartolomeo: Who goes there?
- Ezio: Salve (Hello) to you too.
- Bartolomeo: Ezio! I was expecting my wife. (Sheathes his sword.)
- Ezio: Somehow, that does not surprise me.
Ezio noticed an injured Mercenary being aided by two others. He seemed to have injured his leg, as he walked with a limp.
- Bartolomeo: The French puttane (whores) have us under pressure.
- Ezio: Tell me about their general, this Baron de Valois.
- Bartolomeo: Cesare persuaded King Louis to lend him an entire army to defeat me. I'm flattered.
- Ezio: Where can I find him?
- Bartolomeo: It's only a matter of time before I have Valois by the throat. We have them in retreat.
A bullet hit the barracks wall, mere feet from Ezio and Bartolomeo.
- Ezio: They seem to be getting closer.
- Bartolomeo: The situation is under control--
A mercenary came running from the west side gates.
- Mercenary: (shouting) Close the gates!
- Bartolomeo: Bene. (Good.) So maybe I could use a little help.
The French army began their advance. Bartolomeo and his men fought the French while Ezio worked his way to the gate levers.
- Bartolomeo: Ezio, shut the gates!
Ezio arrived at a lever, but found it surrounded by many French invaders. Ezio began to eliminate the French between him and the lever.
- Bartolomeo: They're coming from the other side!
- Bartolomeo: Defend the other entrance!
Ezio tried to help Bartolomeo, but was still preoccupied with the French soldiers around him.
- Bartolomeo: The other entrance!
- Bartolomeo: The gates!
Ezio managed to close the first gate.
- Bartolomeo: Secure the Barracks!
Ezio worked his way toward the next lever. Another wave of French soldiers charged.
- Bartolomeo: They come again. Bianca thirsts for French blood.
- Bartolomeo: We are surrounded!
Ezio fought off the new wave of French on his way to the next lever.

- Bartolomeo: Ezio, shut the gates!
Ezio managed to shut the second gate.
- Bartolomeo: They're coming from the other side!
- Bartolomeo: Defend the other entrance!
Ezio fought his way through yet another wave of French to get to the final lever.
- Bartolomeo: The other entrance!
Ezio shut the last gate and eliminated the remaining French soldiers inside the Barracks.
- Mercenary: The Baron de Valois signals from the field!
Octavian de Valois sat on his horse at the bottom of the hill that the Barracks was built upon, surrounded by French troops and banners. Ezio, Bartolomeo, and the remaining Mercenaries stood behind one of the closed gates to speak with Octavian from afar.
- Octavian: Bonjour, général d'Alviano. Êtes-vous prêt à vous rendre? (Are you ready to surrender?)

- Bartolomeo: Why don't you come closer and say that?
- Octavian: You must learn how to speak French. It would mask your barbaric sensibilities.
- Bartolomeo: Perhaps you could teach me, and I would instruct you in fighting, since you seem to do so little of it!
- Octavian: As amusing as this parley has been, I'd like your unconditional surrender before sunrise.
- Bartolomeo: Hah! My lady Bianca will whisper it in your ear.
- Octavian: I believe another lady might object to that.
A French soldier came forward, holding Pantasilea Baglioni, Bartolomeo's wife, hostage.
- Pantasilea: Mio marito vi ammazzerà tutti! (My husband is going to murder all of you!)
- Bartolomeo: I'll kill you, fottuto francese! (you French fuck!)
- Octavian: Calm down, for your wife's sake. You know my terms: Enter my camp unarmed at dawn.
Octavian and his men turned and left.
- Octavian: (Over his shoulder). And practice your French. Soon all of Italie will be speaking it.
- Bartolomeo: I will get you pezzo di merda figlio di puttana! (you piece of shit son of a bitch!)

Ezio and Bartolomeo each mounted a horse and gave chase to Octavian de Valois. Eventually, they saw the French camp.
- Ezio: This is their camp?!
The two arrived at the front gates of the camp.
- Bartolomeo: You steal a man's wife and then go hide inside a fortress? (gesturing toward his genitals) Nothing hangs between your thighs. In fact, there is a hole there so deep it reaches into the maledetto inferno! (fucking underworld!)
- Ezio: What good are you to her dead? We will regroup and fight through the gates as we did at the Arsenale.
- Bartolomeo: The entrance is thicker with Frenchmen than the streets of Paris.
- Ezio: So we will climb the battlements.
- Bartolomeo: They cannot be scaled. (with a defeated tone) Pantasilea would know what to do. Maybe this is the end. I enter at dawn bearing gifts and hope that coward spares her life.

- Ezio: Perché non ci ho pensato prima? (Why didn't I think of it before?)
- Bartolomeo: What did I say?
- Ezio: Call your men back to the barracks. I will explain there.
- Bartolomeo: You better have something good. (To his men) Fall back!
Bartolomeo, Ezio and the Mercenaries fell back to the Barracks.
Outcome
Ezio successfully defended the Barracks, without taking any damage. After he saw the Baron's fortress, Ezio came up with a plan to rescue Pantasilea.
Trivia
- To achieve full synchronization the player can't take any damage.
- If the player does not close any gates, an infinite resource of French troops will enter the fray when others die, resulting in a 'survival' mode. Whilst doing this, the player can play around with new moves and test the mettle of their Apprentices during combat with an endless time limit and enemy count.
- Strangely enough, if in this memory you shut the gate on a French soldier so that he is right next to the gate and that is the last French soldier left, if you get Bartelomeo next to the gate he will oddly start throwing stones at the gate as to aim at the French soldier.
- Even though Ezio and Bartolomeo are both Assassins and would easily be able to scale the stone gate of the fortress, Bartolomeo still comments that "they cannot be scaled" because his men are unable to freerun, being only trained as mercenaries.
Gallery
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Bartolomeo welcomes Ezio
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Pantasilea held captive by the French
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Bartolomeo and his mercenaries outside the French camp