Assassin's Creed III

Assassin's Creed III Achievements


Complete 100% of all main mission constraints.  

Play all 12 sequences, gaining 100% sync on all of them. You must do all optional tasks and not fail them. There are 2 ways to do this.

1) Immediately reload checkpoint if failed during initial playthrough of each mission. If you exit, the game will remember which checkpoint you are on and there is no need to restart anything.

2) Replay the memory through the Animus memory sequence menu. If you fail the mission here, you will have to restart the entire memory. There is no option to restart from checkpoint. 

For a more in depth guide, view the 100% Sync Guide.

Rate this achievementAverage Rating (Based on 6 votes)
User Comments
Comment #1 by MustaPastori
Friday, September 14, 2012 @ 08:54:06 PM

So this is basically 100% synch every mission? Shit achievement.

Comment #2 by Eldriken
Friday, September 14, 2012 @ 09:06:44 PM

@1 It's not like it's ever been hard to achieve 100% synchronization in any of the previous games.

Comment #3 by Crims0nPenguin
Friday, September 14, 2012 @ 09:57:18 PM

I actually like these achievements, it gives you something extra to work towards...

Most of these achievements are piss easy already...

Friday, September 14, 2012 @ 10:07:18 PM

Agreed. I like having a goal to push for assassin perfection.

Comment #5 by DisturbedFan X
Friday, September 14, 2012 @ 10:09:32 PM

@1 It was said in a GameInformer a couple months back that there is now a checkpoint system for getting 100%, so this achievement will probably be pretty easy.

Comment #6 by BiggD
Saturday, September 15, 2012 @ 12:30:58 AM

these 100% synchronizations are actually quite enjoyable so this looks like a solid achievement to work on after completing the main game.

Comment #7 by WilliamCL57
Saturday, September 15, 2012 @ 03:37:49 AM

#1, your comment makes no sense. I like these achievements because they require you to "Achieve" something.

Comment #8 by MORON2
Saturday, September 15, 2012 @ 03:27:12 PM

@2 You're right. I only struggled on a few missions in AC: Revelations but it was retarded that you can't restart from where you failed and had to do the whole mission again plus watch the same stupid cutscenes.

Comment #9 by SaphireCurve
Saturday, September 15, 2012 @ 03:39:19 PM

have people forgotten the real meaning of Achivements?

Comment #10 by csfreedom
Sunday, September 16, 2012 @ 06:20:54 AM

i like this achievement. It lets you replay the game and start working on something.

Comment #11 by GOSHJOSH1214
Sunday, September 16, 2012 @ 02:01:53 PM


Comment #12 by IzunaOtoshi
Friday, September 21, 2012 @ 06:27:54 AM

akk main missions , i think side missions it isnt counted may from sequence 1-final sequence u must done at 100%.

Comment #13 by starwarsfan0402
Wednesday, October 10, 2012 @ 03:28:36 PM


Comment #14 by inmate00187
Monday, October 15, 2012 @ 08:26:11 PM


Comment #15 by Dante XBA
Tuesday, October 23, 2012 @ 08:42:54 PM

Hallowed be thy name.

Comment #16 by dusty125
Wednesday, October 24, 2012 @ 04:10:16 AM

The only time I get frustrated with this achievement is when the Full Synchronization Objective is "Complete in X minutes." I really hated the time constraint.

Comment #17 by shakeNbake0810
Wednesday, October 24, 2012 @ 07:32:31 AM

@1 Most games require you to 100% for all achievements how is this a shit achievement?

Comment #18 by rockhopper
Saturday, October 27, 2012 @ 01:50:53 PM

They start getting harder at the end of sequence 2. But an easy way to do a lot of them is if you mess up, you can restart checkpoint and keep trying. Used that for an objective where you have to sneak through a well guarded dock area that I was really struggling with.

Comment #19 by DragonBikerNick
Monday, October 29, 2012 @ 03:22:11 PM

game isn't even out yet and ur making opinions on achievements? wow. least give it a chance to be released and attempt to complete before talking bout it

Comment #20 by Floyd.
Tuesday, October 30, 2012 @ 05:17:23 AM

I don't understand how to get the one in sequence 2 where you have to free the captives, then find and kill the general. Whenever I free them, I auto-fail the general, even though I go kill him afterwards. Wtf?

Comment #21 by Otherwize
Tuesday, October 30, 2012 @ 11:34:02 AM

@20 The general you need to kill in the optional quest is not Silas

Comment #22 by Floyd.
Tuesday, October 30, 2012 @ 07:27:20 PM

Oh, thank you, I was not aware of that! I appreciate it.

Comment #23 by inmate00187
Wednesday, October 31, 2012 @ 01:11:17 AM

The general you need to kill is to the far right of where you start walking when this mission begins. You can also get the corner spot assassinations. Lean against a box in the corner and whistle. Be patient, though! Sometimes when you whistle, nothing happens. Other times, you get a whole patrol. I get five killed before they started counting for me. Then, for some hilarious reason, the rest of the guards started killing each other! Great to watch until, for some Insane reason, the last one alive started killing the horses. no explanation for it.

Comment #24 by RemkoX360
Wednesday, October 31, 2012 @ 01:53:30 PM

this achievement is a bit of a time consuming grind. there are a couple of missions that have questionable and hard secundairy objectives. gonna take a bit of luck and time to complete em all..

Comment #25 by Thelaststory
Friday, November 02, 2012 @ 11:11:09 AM

Does anyone know if the "Complete all constraints in one playthrough" counts toward this or is it just the individual ones?

Comment #26 by Slayed Hunter
Friday, November 02, 2012 @ 02:38:32 PM

Some optional objectives are really hard :( and its sad that you need them all in one play through as well. Still kind of fun going for them on your first play through. Restarting the mission from the beginning over and over is a grind though.

Comment #27 by Otherwize
Friday, November 02, 2012 @ 04:33:16 PM

@25 I only need one more "Complete all constraints in one playthrough" and the achievement hasn't popped for me so yea I think you need them.

Comment #28 by Otherwize
Friday, November 02, 2012 @ 04:48:15 PM

@25 Ok i just got the last "Complete all constraints in one playthrough" and it popped. So you need them all

Comment #29 by xDeMoN PiLgRiMx
Saturday, November 03, 2012 @ 10:19:17 AM

@20 in sequence 2 to find the general, go right instead of left when you have to free the slaves. He is in the middle of a small camp.

Comment #30 by P4ndAK1l7a
Saturday, November 03, 2012 @ 10:36:26 AM

Guide to 100% Sync.

Comment #31 by JackAzzMcTittles
Saturday, November 03, 2012 @ 09:55:08 PM

i cant get sequence 11, 'battle of the chesapeake' only 1 frigate has a targetable powder thing, & it gives me the first constraint half the time, even though i do the same thing

Comment #32 by Suum Quique
Sunday, November 04, 2012 @ 03:29:57 AM

Just got this achievo! Still waiting for the credits to finish up so i can do the epilogue...

Comment #33 by XCVii 007
Sunday, November 04, 2012 @ 04:24:11 AM

Completed Guide to all Main Missions:

Comment #34 by Samigi
Sunday, November 04, 2012 @ 08:08:12 AM

Easy as pie.

Comment #35 by frank2
Sunday, November 04, 2012 @ 06:54:14 PM

Thanks for the guide

Comment #36 by Laag5002
Monday, November 05, 2012 @ 11:50:14 AM


Comment #37 by TheyCallMeNis
Monday, November 05, 2012 @ 02:15:17 PM

If you miss one can you go back after completing the game and replay certain missions to get 100% synch in?

Comment #38 by Pineconekiller
Monday, November 05, 2012 @ 03:17:36 PM

@ #37, yeah you can can do to your DNA bar and do any mission you want, and you can even skip the cut scenes to fly past it. I had to do about 8 missions going back for the achievments, so only took me about an hour! Not bad for 50.

Comment #39 by TheyCallMeNis
Monday, November 05, 2012 @ 03:48:06 PM

@38 ok thats what I thought that it was just like the other assassins creed. I just heard someone say different and made me soil my pants. Thanks mate.

Comment #40 by TwoEight0ne
Monday, November 05, 2012 @ 08:50:52 PM

So, say I miss one of the "in one playthrough" thingers. Will I have to start a BRAND NEW game and do all of the missions over again just to get this? If so, it is alot of bull shit for 50G. And plus, I just missed the sequence 6 one without noticing, and not I'm locked out anyways. Good job being nazis with the 100% sync, Ubisoft.

Comment #41 by GenuineKildKeny
Monday, November 05, 2012 @ 11:15:15 PM

@#40 you should only have to go to the DNA sequencer and select the sequence that u didn't acheve 100% on and just redo the sequence.

Comment #42 by WaPaKaLyPs3
Tuesday, November 06, 2012 @ 09:20:21 AM

fuck this game

Comment #43 by GenuineKildKeny
Tuesday, November 06, 2012 @ 05:51:27 PM

@40 I figured it out go to sequence 9.1 and talk to Washington and it will complete does any1 know where to do the 50 m jump?

Comment #44 by redsgamester
Tuesday, November 06, 2012 @ 11:15:12 PM

Same as #40. I'm not sure where to jump??? I tried climbing to the top of the ships in the Boston harbor and jumping off the cliff in homestead close to the harbormaster and no cigar.

Comment #45 by redsgamester
Tuesday, November 06, 2012 @ 11:16:46 PM

Oooooppppsss I meant same as #43. Sorry

Comment #46 by Pineconekiller
Wednesday, November 07, 2012 @ 01:02:10 AM

Off the log in north east frontier, near Johnson's house.

Comment #47 by GenuineKildKeny
Wednesday, November 07, 2012 @ 09:43:22 PM

Thanks I got it

Comment #48 by redsgamester
Wednesday, November 07, 2012 @ 10:45:33 PM

Thanks as well. I found it.

Comment #49 by grumpyyogi1968
Thursday, November 08, 2012 @ 06:16:48 PM

i have another bug i think, in sequence 4 when you teach hunting you need to gather 3 different animals to get 100%, i hunt 1 hare, 2 foxes and 2 deers and it still says i have only 2 different animals, tried 5 times and nothing i do works. any idea on how to solve this?

Comment #50 by S1YAH
Friday, November 09, 2012 @ 10:21:17 PM

@ #49...You should skin the animals so they would count as hunts, that's what happened with me.

Comment #51 by grumpyyogi1968
Saturday, November 10, 2012 @ 10:35:10 AM

well, i started with the fox and it worked however everytime i do the fox last, it does't register the 3 different animals. no matter, i have it now and i am done with this achievement :)

btw, all you need to do for this one is complete 100% of the 12 sequences, no need for any of the sidequests or to have 17070 points.

Comment #52 by S1YAH
Saturday, November 10, 2012 @ 12:09:36 PM

#51 Awesome, thanks for the info.

Comment #53 by Haziord
Saturday, November 10, 2012 @ 03:14:07 PM

I'm having a tough time using the snare and the bait in like sequence 3 or 4. I put bait down, then snare. I tried switching up the order: snare then bait. Neither gets me the full sync. Anybody know what's up?

Comment #54 by mrplomp
Sunday, November 11, 2012 @ 04:12:05 AM

@ #43 the 50 m dive into water can be found when you do the quick travel to the indian village in the top part of the frontier, you just follow the road that goes south, then u see a split, take the left road, follow it and there will be an hanging over tree that gives you the 50 m dive into water.

for Questions send message to gamertag MrPlomp

Comment #55 by ryan9483
Sunday, November 11, 2012 @ 02:12:38 PM

Of all the Creed games, this one seemed the hardest to 100% but I guess it makes the achievement worth it.

Comment #56 by Squirrelygod
Sunday, November 18, 2012 @ 06:19:16 PM

Shouldn't be that bad

Comment #57 by Schmidtkt1
Thursday, November 22, 2012 @ 02:21:24 AM

I've been a huge fan of the AC games. This is probably gonna be the one achievement that takes up the most time.

Comment #58 by The Produca
Friday, November 23, 2012 @ 11:37:22 AM

I have all the mission,contraints done on two missions but they say only 88% completed.

Comment #59 by Slaughter.
Saturday, December 01, 2012 @ 05:16:10 PM

for the rescuing natives/captives mission where you kill the general, just use eagle sense and kill the guy in yellow from a corner so you get that one as well

Comment #60 by caue1996
Monday, December 03, 2012 @ 12:31:53 PM

Some one knows how can I repet some memory for listen all the conversation?

Comment #61 by Prelude2disastr
Wednesday, December 12, 2012 @ 07:31:46 AM

The only memory I had issues with was "Chasing Lee" but after seeing that I'm a moron and a bit of the boat collapses by the ladder, I got it first time.

Comment #62 by FistDeep
Tuesday, December 18, 2012 @ 10:00:10 AM

58 you got to do all the contraints in one game. i hope you understand what i mean, im frensh soo
like 3/3 in one try

Comment #63 by FEARtheBatman39
Friday, December 21, 2012 @ 03:22:08 PM

Doing the Battle of Chesapeake Bay and getting two of the weak spot kills sucks and seems impossible... Anyone have any tips for me? It's the only level I have left to 100% and I have tried everything I can think of.

Comment #64 by them sticks
Saturday, December 29, 2012 @ 11:19:08 AM

#53 I had a tough time doing this at first. There are tons of bugs in the game and detecting the snare/bait combo must be one of them. Trying laying a snare then throwing bait in one of the winter missions. Out of curiosity, did anyone else have an infinite supply of bait at any point in the game? I did for a long time and none of the animals were interested it. So strange...

Comment #65 by hartley hitmen
Monday, January 07, 2013 @ 04:02:16 PM

On missions where it says complete all constraints in one play through you CAN use reload last checkpoint from the start menu. However, if fail the mission (ex. get detected) and the mission auto-reloads the last checkpoint then you will have to start the mission over. So just make sure to keep a keep trigger finger for that start button in case you think a Fission Mailed is nigh.

Comment #66 by Suthef
Thursday, January 24, 2013 @ 01:10:00 PM

This is not that hard if you keep trying.

Comment #67 by JonesyH
Saturday, January 26, 2013 @ 01:22:13 PM

A dedicated achievement for a dedicated player ;) , Ill get to it one day :L

Comment #68 by Pakhair
Saturday, February 02, 2013 @ 04:15:57 PM

Was Fun but some constraints can be super annoying and luck based and what I hate is luck based. And if someone is still having problems with Naval missions expse gun powder synchronizations, after getting Naval Arm upgrade go to ram the ships head to head, stop your ship (from full Sail to stop) right before hitting the other ship and if done right will always expose gun powder. If you don't have the upgrade ram them from front and it will do the job.

Comment #69 by WhiteyCakes
Sunday, March 17, 2013 @ 08:52:06 PM

Sequences 1-12 all show 100% completion but perfectionist did not pop after the epilogue. Anyone have ideas?

Comment #70 by WhiteyCakes
Sunday, March 17, 2013 @ 08:55:42 PM

Never mind...found one

Comment #71 by childofbelial23
Friday, April 05, 2013 @ 09:49:43 PM

Fun achievement fun game all around awesome

Comment #72 by WhtTrshTrojan
Sunday, October 06, 2013 @ 10:38:11 PM

The link is broken. Can someone else check, make sure it just isn't me?

Comment #73 by ParadoxReal8
Wednesday, October 09, 2013 @ 07:25:08 PM

That's not so hard.
This is not 100% everything like the other one.
And yes, we can restart checkpoint even if we go after the game, thanks to Ubisoft for this change to Révélation.
100% on Révélation was hell especially since we could not pass animations.
Great plus they put on this one.

Comment #74 by Jaymo Kurr
Sunday, October 13, 2013 @ 09:01:55 AM

I am apparantly an Uber Perfectionist....I received this achievement before receiving "The Sum of Truth" achievo for completing Sequence 12.

Comment #75 by n0vasurge
Thursday, October 24, 2013 @ 08:07:54 PM

Still working on, a little frustrating with the multiple objectives.... but i like the challenge too!

Comment #76 by Flour PowderEMT
Sunday, January 05, 2014 @ 01:37:11 AM

Thanks for the guide #30, I will be using that on my second playthrough. Also, the top guide says you can't reload checkpoints if you failed an objective, but it seemed to work for me when i messed up not getting detected on a replay of a mission.

Comment #77 by MasterAtreu
Monday, January 06, 2014 @ 06:58:59 AM

So, I have a big problem. I have synced every main mission to 100%. NO ACHIEVEMENT!!! Has anyone else had this happen or heard of anyone who has? Any ideas on what I can do? It is a GIANT piss off. Please help me if anyone has any ideas!!!!!

Comment #78 by Daelus
Monday, January 13, 2014 @ 01:06:32 AM

I know this thread has been dead for a while, but I'm in the same boat as 77; 100% synced on the 12 main missions (80% overall)and the Achievement won't pop. I have no hacks active (or ever) and have rebooted and played several missions including 12 over again....nada. Not cool.

Comment #79 by Daelus
Tuesday, January 14, 2014 @ 12:15:29 AM

SOB....77, the issue is that each of the 12 have multiple parts; it isn't obvious. The 100% is for the top act of the sequence; use the left stick to toggles down the list within the sequences.

Comment #80 by GreenTunics
Monday, March 23, 2015 @ 02:30:10 PM

Get me Oringal Gamer
can someone please do this for i will give you my proflie to lend and upload my save data to the Cloud Storage in Exchange i will do the same thing for your profile any achievement you missed in ac3 in good standing or Perfectionist Please PS: i have DLC with it must have I already beated Only Fanorona

Comment #81 by Kapitan Igor
Wednesday, July 20, 2016 @ 12:06:47 PM

This took me one playthrough to get, seriously, this isn't that hard! :P

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Game Info
Ubisoft Montreal


US October 30, 2012
Europe October 31, 2012

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