the mp is hard as hell if you dont have good players on gold

@Sideburns: I have no experience with MP on Gold, but with randoms it is easy to fail even Bronze challenges on waves 9-10 so I am not surprised that Dank Ki11a has said they are very hard. I would expect them to be very hard as well. Since you have to go through the game on Insanity anyway, and the extra missions are not any harder than what you have to do on Insanity core missions, I did the same as you and just did it all in SP.

prority missions and names are wrong but still, great job

I don't see how someone can negative vote this. It helps a lot. Great job.

@Chimaera36. You should mention that Grissom Academy: Emergency Evacuation is missable. If you don't do in within 3 missions of getting the mission the student will be captured and the mission will count as failed.

What about the other quests where you meet your previous teammates from ME2 i.e. Citadel: Hanar Diplomat?

@Pyro1099 - That mission is not required - only missions involving combat actually matter. On my insanity run, I did _only_ the missions above to get Unwavering. I did nothing on the Citadel at all.

I'm doing my second, perfect paragon playthrough on Insane so I was wondering whether it counted or not. It doesn't matter though, I'll still be doing the mission.

I'm finding all these missions easy though, as long as you stay behind cover and use Liara's stasis bubble you'll have no trouble. I found that giving my second teammate, either Garrus or Ashley a Black Widow which is maxed out for damage and accuracy helped a lot. They would usually do massive damage on harder enemies I had trouble with. I tend to move around behind cover and let them DPS.

ive found if you missed a mission (such as grissom / tuchanka ones), you can load a previous save, beat it, and it'll count on the achievement tracker.

@Tony Starc: Thanks for confirming that. I believe I did the same thing, but forgot to put it in the solution. Added!

Dang, i totally missed one quest and I can't figure out what it was. since i got the insanity achievement and i know i completed all the cerberus ones it must be one of the side missions. at least i can narrow it down to the rachni/grissom (both of which i reloaded previous saves to do but i think something may have gone wrong) - but i can still confirm that thing i said before bc it worked for a cerberus mission for me

- Tuchanka: Bomb is missable... i had the mission (as i was close to tuchanka) but i prefered to go and do sometihng else and after the mission i did i got a message from wrex that tuchanka was destroyed from some sort of bomb.
glad i had a save and just had to replay 1,5h. xD

Dang, i totally missed one quest and I can't figure out what it was. since i got the insanity achievement and i know i completed all the cerberus ones it must be one of the side missions. at least i can narrow it down to the rachni/grissom (both of which i reloaded previous saves to do but i think something may have gone wrong) - but i can still confirm that thing i said before bc it worked for a cerberus mission for me

figured out what i was missing. it was tuchanka: bomb. it's missable as well, but if you've activated it it will actually be greyed out in the mission log as if it were completed even if you haven't. i think all the missable ones do that if you activated them but don't do them in time, so be aware of that. check the ME wiki for a list of missable quests, there's more than just the one you listed

I was having trouble on 'Geth Dreadnought' in insanity so changed the difficulty. Changed it back to insanity before the end and it counted for one of the 27.

(I know this will not work if your going for the insanity achievement)

I just beat the game on insanity after completing every mission and did not receive the achievement. I can recall doing all the missions listed. Any idea what could have happened?

@holy - What foes the achievement tracker in the extras list say about X/27 missions?

26/27. I'll try loading an earlier save and attempt the N7 missions again. It sucks how it won't tell you specifically which ones still need to be done.

DLC does not count towards the achievement by the way. I've done them along with the other missions and I've currently got 4 left to do until the achievements pops at 27 (Sanctuary, Cerberus Base, Earth and Citadel Final).

Still no luck. I beat the N7 missions again and nothing. Anyone else have this achievement glitch?

I found a post on the official Bioware forums were people have run into their achievement progress being reset and glitched. I think this is the problem I am having. Here is the link for anyone who is interested: http://social.bioware.com/forum/1/topic/323/index/9801757/1

Hopefully they will release a patch to fix the problem!

As far as someone else pointed out with the Priority names being... off, this is solid. Copied and pasted to a Notepad so I can check them off as I go. Thanks a bunch!

Mines on 26/27 and I've definitely done all the missions... Theyre all ticked off in the Journal and I got the Insanity achievement so I didn't change the difficulty at any point.. I hate it when this happens...

@shanecasper I have the same problem. I was looking through my journal and found out that Tuchanka: Turian Platoon was missing from the journal even though I knew I did it. I attempted to do the mission again on newgame+ but that didn't unlock it and the mission was erased from my journal again. I'm trying to finish the mission on a completely new character. I'll let you know if it fixes it.

one does not simply finish all mp maps on gold

I tried the mission on a new character and it again glitched, disappearing from the journal. I tried it on narrative difficulty to see if it would work before trying it on insane. Here is a video I recorded showing it in the journal before the mission and then missing once I'm back on the Normandy. http://www.youtube.com/watch?v=MwaEX00eH9I

The mission Tuchanka: Bomb is also missable. If you complete three missions before completing this mission, it will no longer be available and considered failed.

The best way to check yourself if you're doing them in one playthrough is to have 24/27 completed before making the final assault on Cerberus HQ. Cerberus, Earth and the Citadel are the final missions.

i just checked after every mission that my tracker went up by one so if it dint i know sumthing went wrong for that mission but i dint have any issues and all counted and got achievment. Though other achievment trackers did sumthing similar i had to do the multiplayer version of do all 6 n7 missions as the tracker for this got stuck at 3 and still is now after my 2nd playthrough.

I'm doing this now. I did an Insanity run, now I'm going back and doing the additional side missions that I didn't do on that run. (I didn't want anything in the way of the Insanity run.) Doing a straight Insanity run requires 15 missions... you have to do one Tuchanka and one Rannoch, but you can skip the others. The other 12 are what you need. I'm going back to the menu and checking EVERY mission as I complete it to see if any don't pop up. So far I've done N7: Cerberus Labs, and I'm up to 16.

I just finished my Insanity run and got this achievement with no problems whatsoever. I did ALL of the side missions, just like my first run. Maybe that's why I didn't have problems- one of the side missions might have counted towards the 27 when a normal mission didn't, I don't know. Just thought I'd offer my two cents.

I played as a level 60 Engineer with EDI's power bonus, I died just about as many times on Insanity as on Normal which is kind of odd but I think the extra protection helped a lot.

You can play each mission on narrative and change it to insanity just before final cutscene. Far more easier and faster way than on mp.

Can you still get this achievement if only one person survives on gold?

Ozzy InFeRno: Yes

Thanks to the OP for writing up the list ...it came in very handy to keep track not to skip/loose any missions.
Thanks heaps.

I missed one map on my insane run so i decided to try a speed run on casual and got to the mission I needed to get the achievement. I switched the difficulty before I started the mission and finished the mission on insane and I got the achievement. So if you are missing a map just finish the game on insane get the Insanity achievement, then run a game in casual until you get the mission you need, switch the difficulty to insane again and finish the map you need on insane.

Rannoch: Rescue Admiral Koris: Where i got this mission from?

Simply survive? i can not go along with the simply ^^

Tuchanka: Crashed Turian Ship

Does not appear on my list
Does not appear on the ME3 Wiki

Priority : Palaven

and

Priority: Eden Prime

appear on my list but not the guide list.

@holy Canadian I only have 10 completed missions in my journal but It says 11/29 in my accomplishments. I completed Tuchanka: Turian Platoon and that is not listed in my journal. So maybe I avoided the glitch you are having

I can confirm "Tuchanka: Turian Platoon" disappeared from my list but was counted, I don't think you can avoid that mission. Freaked me out when I printed the list and it was missing from my log, its a sound guide, the only way to improve it is to list missions in the order they become available. As long as people complete non priority missions first and as soon as they are availble they shouldn't have a problem unless your console has failed you.

Easiest way to do this is by playing MP and using 4 salarian engineers. Play whichever map you want to, but select the geth as the enemy as the salarian's energy drain is super effective against them. Then just get into a designated area and work in groups of two. Make sure to always have your decoys placed and then just go to town with energy drain and incinerate causing massive damage with the tech bursts. Just did all 6 of the maps last night using this strategy.

Does the citadel final count towards a level done on insanity for example 26 out of 27 then you do the citadel final an that make it 27 ?

Attican Traverse: The Rachni is called Attican Traverse: Krogan Team in my questlog. You should edit your solution cuz I almost missed this one. I don't know if it's called Krogan Team just cuz I saved the rachni queen in mass effect 1.

@I Asbo Aaron I - I certainly hope so!!! I'm currently on Earth with 25/27 and have done EVERY mission so fingers crossed there will be no problems! Although knowing I can do the majority of the missions on Narrative then switch back to Insanity to complete the mission is very reassuring.

im about to assault the cerburus base im currently on 23/27 i know the mission im misssing is rannoch rescue the admiral its still listed on my journal but i cant go there i could earlier in the game but it still wouldnt let me evne tho i did the other 2 missions on rannoch? im also not too sure if i have an old save to go back any ideas?

I had the Tuchanka: Turian Platoon mission disappeared from my checked-off missions in my journal but was still tracked properly in the Accomplishments part of the main menu. Perhaps this is because it's continued by Tuchanka: Bomb mission.

Also, the Kallini: Ardat-Yakshi Monastery mission is originally referred to in the journal as Lesuss: Asari Distress Beacon or something similar to that. It becomes the Kallini mission shortly after arriving.

I did the Rannoch: Geth Fighter Squadrons quest & all other quests on my fist play tho on Insanity but it some how did not register so I completed the game and on my new game+ I did the quest Rannoch: Geth Fighter Squadrons a gen and finally got the achievement =P

It did this to me for the achievement for just doing the quest too it seems to be a glitchy quest =/

Having problems with this, completed Firebase White and Firebase Dagger on Gold MP and went back to look at accomishments, this achievement us still sitting as having done 0. Sane problem with Tour if Duty, it's stuck at 4/6 on MP, any ideas?

Same as above for me

I had 24/27 missions done on my Insanity run as I was going for both in one go. I had 4,986/5,000 kills and all of my counters reset. Even the counters for the achievements I had already obtained.

You should mention that the ardat-yakshi mission is originally titled 'Mesana: Investigate the Asari colony'.

Once you get to the Mesana system and the planet Lesuss the name changes, but someone might skip the mission and head to the Perseus veil/Rannoch missions because they don't realise the Mesana mission is important.