The Hidden Blade Assassin's Creed in Depth

http://youtu.be/fJlv36uWC8c
[Front-paged. -stabguy]

A collection of additional assassinations in AC1, made possible by back to the future exploit.

Maria
Start this the same way as the original early assassination of Maria.
http://www.youtube.com/watch?v=EaikxWTUYVI
Reinitialize the memory by going through the city entrance in the south of Jerusalem. The game doesn't recognize Maria as a target anymore. Now there is no memory corridor scene, and Maria stays dead. It's probably possible to get an instant kill from this by taking out her health and talking to the bureau leader, but I didn't have enough time to record more.

Sibrand
Start this the same way as the original early assassination of Sibrand.
http://www.youtube.com/watch?v=3Tww7kpXiA8
Reinitialize the memory by going through the city entrance in the north part of Acre (there's also an entrance in the eastern part, but you desynch before getting there from the game thinking you already started the mission). Sibrand usually goes onto the docks and walks back and forth along them just like the guard patrol. He's unresponsive to you, but still reacts to seeing dead bodies (in the original Back to the Future assassination he can detect you and would run back to the ship to get to the guard tower). Now that the game doesn't recognize him as a target there's no memory corridor scene. You can also take out his health for an instant kill, but it isn't very interesting.

Note: Aurel found this first and then told me about it, so I didn't really do anything.
You can do this by starting the William assassination at the bureau and then infiltrating the fortress without the scene starting (see this article). At certain points in the fortress, all the soldiers will disappear. You can then setup an 'invisible kill' with air-to-assassinate: you lock onto your target and make sure you jump through one of these spots. Near the back of the group is a great spot.
Altaïr then performs an air-assassination ( ) and the memory corridor scene starts. Afterwards, you can just stroll out of the area and get back to the bureau, after which you will have completed the mission.
I opted to get out of the city instead, to see if the back-to-the-future exploit worked. It didn't, but William's army has become substantially smaller, which makes setting up an anonymous kill very easy with a couple of knives.

http://www.youtube.com/watch?v=3Tww7kpXiA8
[Front paged. - stabguy]

An early death on Sibrand, made possible by glitching out of the city and restarting the mission. For those not familiar with this exploit watch the original video.
http://www.youtube.com/watch?v=MKrs0HyY7hg

Early Death
Since the game knows you started the assassination mission Sibrand is already on ship before you start the cutscene. Getting to him is another matter entirely since he appears back at the scene location if you enter the shipyard directly. So enter it from the south wall by the way shown in the video. There are some guards along the way that can easily detect you, so be careful (or fight them all off like I did). Before you reach the ship Sibrand gets on the docks nearby. He seems to just walk back and forth along it. Killing him results in the memory corridor scene.

Setup
Getting out of the city after the assassination is trickier in Acre than in Jerusalem since Acre has two closed gates at the entrance. So I used a different method. I did the save citizen mission outside of Acre and gentle pushed the citizen all the way to the bureau, then started the mission. Then I moved the citizen all the way to the cutscene and afterward to the target. After assassinating Sibrand I talked to the saved citizen, which resulted in saving the game. Then I desynchronized. When I respawned it was outside of Acre. Saving the game by a talking to a save citizen results in spawning where the save citizen mission started.

http://www.youtube.com/watch?v=s-rL2hsGhRM
---promoted to front page by Ian---

So I went back to find more things in King Richard's Citadel just prior to the scene in memory block four. And I'm glad I did, because I found a much easier way to get in there, as well as some interesting discoveries.

Easy Infiltration

Play along with the videos below the map to quickly collect all Templar flags, which are in Acre, Rich District.

The first video starts near flag 17, near a town crier. The second video picks up where the first left off: south of Holy Cross, and east of Flag 24.

If you are looking for a specific Flag or Templar in the video, refer to this index:

First video:
Flags 1-5, 1:45
Flags 6-7, 1:00
Flags 8-11, 3:30
Flags 12-14, 5:15
Flags 15-17, 0:00
Flags 18-20, 5:50
Flags 21-23, 6:45

Templar 1, 2:40
Templar 2, 4:30

Second Video:
Flag 24-27, 0:20
Flag 28-29, 2:30
Flag 30-32, 3:00
Flag 33, 4:45
Flag 34, 4:10

Templar 3, 1:35

Play along with the video below the map to quickly collect all Teutonic flags, which are in Acre, Middle District.

The video starts near flag 32, just outside of the southern gate to the docks.

Here is an abbreviated table of contents in case you are looking for a specific flag or Templar:

Flags 1-4, 4:55
Flags 5-9, 6:00
Flag 10, 8:50
Flags 11-15, 7:35
Flags 16-20, 3:40
Flags 21-26, 1:55
Flags 27-32, 0:05
Flag 33, 9:30

Templar 1, 7:05
Templar 2, 9:00
Templar 3, 0:00

Play along with the video below the map to quickly collect all Hospitalier flags, which are in Acre, Poor District.

The video starts next to flag 9. Here is an abbreviated table of contents in case you are looking for a specific flag or Templar:

Flags 1-5, 1:15
Flags 6-7, 0:25
Flag 8, 9:35
Flag 9, 0:05
Flags 10-12, 7:55
Flags 13-15, 6:50
Flags 16-20, 5:25
Flags 21-25, 3:30
Flags 26-30, 2:25
Flags 31-33, 4:50

Templar 1, 9:20
Templar 2, 8:40
Templar 3, 7:25
Templar 4, 2:30

I put away my Assassin's Creed disc when Assassin's Creed 2 was released about 21 months ago. Shortly afterward, I lost the disc, and I was pretty much convinced that I would never see it again. Much to my surprise, I found the disc about a month or two ago, and I started playing it again a few days ago. It was nice to play Altair again...

http://youtu.be/XdOajd9NCio
[Front-paged. Second video moved below the fold. -stabguy]

Preassassination:
It is possible to get inside Garnier de Naplouse's hospital before you can assassinate him using an exploit. You can get in the broken window by superjumping there (a long range jump). To do this you need a character to air assassinate. So lead a guard to a certain spot and kill him without doing any kill animations. He will still be alive for a short time on the ground, and you can kill him with your hidden blade only. During this time he can be reanimated. To do this find a structure to air assassinate him from. Stand on the other side of the structure, lock on and attempt to assassinate him.

You will bump into the floor of the structure which will cause the air assassinate to fail, but the guard will stand up again and start to walk. He will be unresponsive and won't be affected by gravity which will cause him to airwalk in a straight line. Use this as a way to get in the hospital by trying to get a guard to airwalk to the broken window. I'm not sure if anyone else has found out this exploit (I haven't seen it on youtube so I'm assuming no one has). Once inside the hospital you will find Garnier and two other guards standing by the door. If you kill them they will stay dead for the scene and even afterward. With Garnier already dead there's no way to assassinate him without restarting.

Finally got around to doing this. The goal is to escape while inside the fortress. This is a pretty robust route, always works for me. There are other hiding spots inside the fortress should anyone else want to try this.

Ian and stabguy pretty much nailed all the stunts for this assassination, so I thought I would take a different approach. Use the priests so you can blend right next to him and assassinate him in front of all his guards.

For those interested I will start working on the save citizen video for this district soon