Dead Kings

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Dead Kings

Hydrogen Bonded achievement in Assassin's Creed Unity

Hydrogen Bonded

Achieve 100% synchronization in Dead Kings.

Hydrogen Bonded+0.2
2 guidesOnline/OfflineSingle PlayerCooperativeCollectable

How to unlock the Hydrogen Bonded achievement

  • BoyzRFlattBoyzRFlatt538,971
    15 Jan 2015 14 Jan 2015 31 Jan 2015
    160 8 32
    Unlike most Assassin's Creed "100% Sync" achievements, this DOES NOT refer simply to the 6 story sequences.

    This achievement requires you to complete:
    -All story missions with bonus objectives (6)
    -All Stories of Franciade and Murder Mysteries (6)
    -All Co-op/Heist missions (2)
    -All Sugar's Legacy riddles (7)
    -All Outposts (3)
    -All Viewpoints (3)
    -All Artifacts (14)
    -All Napoleon's Bicorns (26)
    -All Chests (61)

    Sequence 13 (Story Missions)
    Not my own video personally, but Centerstrain01 on YouTube has 100% guides for the story missions. Here's the link for the first memory. Go to their page to find the rest of the videos/be supportive of their efforts.

    Co-op missions will not appear on your map until you have already done them once. To access them, go to "progress tracker" in the pause menu. These can also only be played in private (no public matchmaking) but can easily be complete by oneself if you have no co-op partner available.

    The co-op mission is a straightforward "protect these guys while killing these other guys" sort of mission. Very similar to the one in the main game where you protect Napoleon. You do not have to get all 3 rewards from the Co-op mission.

    I made a video showing an optimal entry method to the most optimal starting point. The objective is NOT always in the same location. Just enter through the window in the video, and head through the building until you find where the objective is. It moves every time you restart, so if it is out in the open courtyard or somewhere else you feel you may not be able to reach it easily, simply die or restart and it will move.

    Tips for Heist:
    -Always be sure to stay within the yellow area on your map so you don't wander too far into an area where the objective won't be. The building is not entirely covered in yellow.
    -Use Eagle Vision repeatedly although the orange objective marker should appear once you are in proximity, with or without Eagle Vision active.
    -You must be anonymous/out of conflict in order to open chest. Be extremely cautious when making your escape.
    -If you die, you will fail, and if you go out into the open area in the middle, you will die.
    -The escapes are much easier from the top floor than the ground floor
    -Do not worry about your bonus reward (unless you want to worry about your bonus reward) as it doesn't count towards completion percentage.

    Each of the 3 missions requires you to kill 3 targets. These can be tough, as they are completely surrounded by guards and have 5 diamond difficulty ratings. I recommend just stocking up on medicine and just running right into the fray and killing the targets. If you die, the targets you already killed will remain dead and you can move on to the next one.

    Sugar's Legacy
    2 of the Sugar's Legacy riddles are part of the main story and are required to complete it. Video guides for the remaining 5 can be found on 360GameTV's channel here. Go to their channel to find the remaining 4 videos and to support their efforts.

    The final wrap up mission "finis" does not count towards completion (although is required for the "Defender of Franciade" Achievement).

    Here's also a link to the site I personally used for finding these for those who prefer text and still pictures over videos.

    Not all collectibles appear on the map at first, or after Viewpoints. You must pass near collectables before they will appear.

    The various gold chests and pamphlets scattered around do not count towards completion.

    I recommend, if it's not too late, to try to nab as many of the collectables as you can while progressing through the story, co-op, and Stories missions. This will lead to less running in circles later on and will allow more of them to be revealed earlier on.

    Also, save these for last. If you play through all of the other missions and such first, you will have revealed the locations or found the majority of these naturally, without having to wander around aimlessly too much.

    Progress can be tracked easily under "Progress Tracker" in the pause menu.

    I have not personally found this site to be very helpful, but perhaps some of you might. Browse through it to find videos for all the different types of collectibles.

    Clear map of all underground chests
    External image

    Not complete, but here are videos and links that show you maps with all underground chest locations and windmill locations (plus others) and all Artifact locations. Will continue to update as more complete maps become available. Videos by 360GameTV, NonStopTrophies, and VGFAQ respectively.

    Guide not helping? View 1 more guide for this achievement.

    Showing most recent comments. View all comments.
    Zorc freeksDidn't pop for me
    Posted by Zorc freeks On 27 Sep 22 at 07:15
    AJmonUpdate: I was able to get this Achievement but wanted to warn that if it doesn't unlock when it should (100% sync in DLC, not just main missions) no amount of troubleshooting worked for me.

    Multiple hard resets, reinstalling the game and DLC, disconnect Uplay/Connect, replaying story and multiplayer missions - nothing did the trick. If you experience the same, might be best to cut your losses and start a fresh save (Delete local data, disconnect from internet and start anew). DLC can be started after Sequence 4, but I recommend finishing Sequence 5 for improved lock picking skills.

    Good luck all!
    Posted by AJmon On 28 Sep 22 at 05:55
    Zorc freeksI'll just add, I had to redo the DLC because of that, check the forums, before you pick up the last item, make sure you quit the entire game (i.e. dashboard, but actually quit the game itself via the guide button and click start on the game and quitting it) then reload it, it will have saved on cloud, pick up the last item and if the achievement doesn't pop in 30 seconds or so, delete the saved data from your console and try again and again until it pops.

    Also you can grab all the chests in the crypt during mission two, if you run out of picks just reload the check point and you'll be in the crypt with all picks still in inventory and any chests you open won't have to be done again, works for the other areas under ground during other missions too.
    Posted by Zorc freeks On 30 Sep 22 at 06:53
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  • I Fifoo II Fifoo I399,304
    22 Jan 2015 22 Jan 2015
    37 9 3
    I just want to warn you that Murder mystery missions may not appear in the DLC if you haven't finished one in the regular game.
    Travel to Paris and go for the first mission you are supposed to do in the regular game in the middle of "Ile de la Cité" then travel back to Franciade both missions will be unlocked.
    Showing all 3 comments.
    zsoltee53Your idea is worked well, but your solution a little bit deficient.

    You have to complete the "Eugène François Vivocq - Murder Foretold" murder mystery from the main game in Ile de la Café district in Paris to unlock the 2 DLC mysteries.
    Posted by zsoltee53 On 11 Nov 15 at 13:58
    I ASK NO ONEThis is more of a comment, not a solution.
    Posted by I ASK NO ONE On 07 Oct 18 at 13:05
    Cky616craig1There is no comment section to be seen immediately.
    I'm glad this was out in the solution section, it may not be a solution but is helpful. +1
    Posted by Cky616craig1 On 17 Oct 19 at 13:18
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