Dead Space 3

Dead Space 3 Achievements

The Explorer

Complete all optional missions.  

Within the game there are optional missions you can complete. Complete them all for the achievement. Not every chapter has them. There are a total of 10 missions, 3 of them which are optional. You can choose to play the optional missions in chapter select if you have a second person in your party. The missions usually consist of getting to a container with parts and circuits.

Click HERE for a guide containing all collectibles and side mission details.

Rate this achievementAverage Rating (Based on 1 votes)
User Comments
Comment #1 by an7man
Friday, December 21, 2012 @ 01:13:45 AM

Hopefully they're not miss able... But most likely they will be..

Comment #2 by Hurricane Of 87
Friday, December 21, 2012 @ 10:35:05 AM

Yeah, I think 'optional' implies that you don't need to do them. ¬_¬ Depends if you have to go out of your way to find them (Dead space isn't known for it's open-world-ness) or if you're assigned them during your missions like Assassin's Creed.

Comment #3 by rockhopper
Saturday, December 22, 2012 @ 12:47:54 AM

Side quests in a Dead Space game?! Interest piqued.

Comment #4 by CxHxUxD
Wednesday, December 26, 2012 @ 10:00:30 AM

Sounds interesting! I can not wait to check this out!

Comment #5 by ShpioOn
Friday, December 28, 2012 @ 11:10:10 AM

Can't wait for this!!

Comment #6 by freaks
Tuesday, January 01, 2013 @ 10:13:46 AM

Oh god! Sidequests!!! I'm gonna LOVE that game!

Comment #7 by Ink129
Saturday, January 05, 2013 @ 11:33:05 AM

There's always the danger that these missions are boring "fetch-quests", but I sure hope this isn't the case. Interested in how this is going to turn out. Arh, February still seems so far away :(

Comment #8 by Pyaxi
Friday, January 25, 2013 @ 04:01:55 AM

Side missions?! I did not expected that coming.... Hope it gonna be interesting...

Comment #9 by LiQuiD 87
Wednesday, February 06, 2013 @ 07:10:33 AM

assuming we can go off mission course for optional side missions, bigger mappage to explore :)

Comment #10 by TheSipuli91
Friday, February 08, 2013 @ 03:16:40 PM

Blegh, they're a pain to do alone and some require a co-op partner which I don't (yet) have. But seriously, I don't need even 1/3 of the med & statis packs in the main missions as I do in the optional ones. Constant huge hordes and those bigger fellas with pickaxes or something aren't helping at all.

Comment #11 by darkmikasonfire
Monday, February 11, 2013 @ 09:26:31 PM

Easy way to destroy people, set up a double shotgun, you can almost max all the stats with a fully done heavy elite frame. -OR- you can go double bolus gun, one normal fire, one 'land mine' fire. both are so powerful, I pretty much beat the whole game just using the shotty, I don't like the bolus but people have stated how good it is.

Comment #12 by Angel4711
Tuesday, February 12, 2013 @ 11:09:16 PM

Do you have to do all of the side missions in one play-though? I can't find this answer, anywhere. I'm on my 2nd play-through and did some side missions the first time and would rather not have to do them again.

Comment #13 by Kelly miester
Wednesday, February 13, 2013 @ 02:25:07 AM

@Angel4711 I don't believe that they do. But your new game + file should on a different slot from your first playthrough. You can load it up and replay a chapter, it should tell you what you have missed and you can collect all the collectibles or replay the optional missions.

Comment #14 by PledgedZebra4
Wednesday, February 13, 2013 @ 08:48:58 PM

@12 It IS on one playthrough, but remember you can replay chapters at any time (and if you picked up the item leading to the mission you can choose the optional mission from "chapter select"). I did my first playthrough solo, then, on new game +, did only the main story and co-op missions. The achievement didn't pop and under "progress & unlocks" it shows those optional missions I missed during my second playthrough as incomplete.

Comment #15 by Ashwee
Thursday, February 14, 2013 @ 07:23:40 PM

To get this achievement, do you have to do the Co-op missions too? Or can you just do all the solo missions and get it?

Comment #16 by Eleriel
Saturday, February 16, 2013 @ 12:36:29 PM

yeah, you have to do the co-op missions too.
(the only unlockables you can get by singleplayer alone are the difficulties, the unitology-, S.C.A.F.-, and Alien Artifacts).

Comment #17 by Eleriel
Saturday, February 16, 2013 @ 12:38:25 PM

#14 new game+ is considered a whole new playthrough.
the only thing that carries over are the collectibles you've discovered (and weapons and resources)

Comment #18 by A Real Psycho
Monday, February 18, 2013 @ 06:46:09 AM

Looking for a co-op partner :) message me if u wanna do the whole game and get all achievements. GT: DarkShadow ohh

I'm online now havent finished the game on solo yet CH 10 :P

Comment #19 by Meangeorge
Friday, February 22, 2013 @ 10:45:33 AM

I could use a little help with all the co-op achievements
Gt Meangeorge II

Comment #20 by CptWesker87
Monday, February 25, 2013 @ 07:48:13 AM

i'll need help with this i'll be online at 1300 est this comments get post on pst i think

Comment #21 by CptWesker87
Monday, February 25, 2013 @ 07:53:18 AM

ok so this comments are posted on central time

Comment #22 by cokebabies
Monday, March 04, 2013 @ 04:26:38 PM

If you do all the solo optional missions in Classic Mode, you do NOT need to do the co-op missions in order to get the achievement.

I can personally confirm this, as mine popped last night in Classic.

Comment #23 by GMFRK
Wednesday, March 06, 2013 @ 04:27:33 PM

I can confirm with #22 seeing as classic is single player only so you only have to do a total of 7 missions instead of the 10 (think it was 10)

I actually didn't know about this till I noticed it randomly pop up when I was completing the disposal mission (and then there were 3 of those things, oh god...)

Comment #24 by LilFuniAZNBoi
Thursday, April 04, 2013 @ 06:58:42 PM

Does anyone else want to do this coop with me?

Comment #25 by ParadoxReal8
Tuesday, May 14, 2013 @ 09:47:26 PM

I got the achievement for all coop-mission but the last one on mission 14 did not enter...
Is it glitched?
Anyway, i'll redo it even if it is a pain in the ass.
Espacially when the partner put it in impossible at any second.
My Gamertag is in my name... :p

Comment #26 by XBF360GH
Saturday, June 29, 2013 @ 05:08:41 PM

Hey I need an help with ALL of the multiplayer achievements if anyone needs to play the game from start to finish and get all the multiplayer achievements message me. My gamertag is XBF360GH

Comment #27 by Lord Atheos
Saturday, June 29, 2013 @ 07:42:10 PM

If you can get this achievement in Classic mode, can you also get the collectible achievements in Classic? Like to bypass the co-op only collectibles?

Comment #28 by DTM 421
Saturday, July 06, 2013 @ 01:41:18 AM

I need to do the 3 co-op missions as well. Will help you out if you need thx

Comment #29 by Murkin Muffley
Saturday, July 27, 2013 @ 08:16:35 PM

Hey im trying to complete the co-op achievements this weekend. tonight or tomorrow. message me gamertag is the same as profile name. got a mic and am not a newb

Comment #30 by hawkeye0226
Thursday, August 15, 2013 @ 12:48:37 PM

need help with co-op mission have noone to complete it with gamertag is same as my profile name thank you

Comment #31 by ac212ac
Wednesday, September 25, 2013 @ 10:26:30 PM

I need some help to complete all co-op missions. GT:Frostied212

Comment #32 by xZOMB1E KILL4x
Sunday, November 10, 2013 @ 08:03:47 PM

Looking to do all the co-op missions together Message me my gamertag is xZOMB1E KILL4x

Comment #33 by SleazyRoller
Tuesday, November 12, 2013 @ 05:28:24 PM

Love playing this game. Always willing to play message me if you need help.

Comment #34 by SleazyRoller
Tuesday, November 12, 2013 @ 05:30:26 PM


Comment #35 by anyold
Saturday, January 11, 2014 @ 03:00:52 PM

co-op partner wanted my gamertag: anyold

Comment #36 by yodaimne
Saturday, February 01, 2014 @ 04:03:04 PM

hey everyone ! I need a partner to:

-Collect the remainings collectibles on the Coo-op mission

-Do the coo-op missions

-Finally all the others miscellaneous coo-op achievements

I have all achievements on the first game and the second one, so it shouldn't be a problem! I'm good at this game m/

GT: xBicmacx

Hit me up !

Comment #37 by PrimeN7
Thursday, March 20, 2014 @ 12:34:50 PM

This is a long shot but if there is anyone out there that would help me out with this cheevo and the other co-ops missions in main campaign then please either message me of add me, my gamertag is NiktawN7

Comment #38 by XAMRipVan
Thursday, February 19, 2015 @ 11:11:08 PM

lookin for coop achievements gt zookler

Comment #39 by Eg3rt
Tuesday, March 24, 2015 @ 10:34:16 AM

Looking for a partner to do all the coop optional missions.
GT: Eg3rt

Comment #40 by bleeding pepper
Sunday, April 19, 2015 @ 04:42:48 PM

If anyone is still looking for someone to get all of the coop achievements, add me: "Bleeding Pepper". I'm a UK player.

Comment #41 by nappydugout
Friday, April 08, 2016 @ 05:37:00 PM

Looking for a partner to aid me in completing a single Chapter 4 Co-op mission. I am 97.4% through the game and looking to clean up, I can return the favor. Looking to do the Awakened Co-op as well
Add GT: Nappydugout

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Game Info
Visceral Games
Electronic Arts


US February 05, 2013
Europe February 08, 2013

Kinect: Compatible
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User Score is based on 384 user ratings.