Mass Effect Legendary Edition

Mass Effect Legendary Edition

127 Achievements

2915 XP

120-150h

Epic
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Galactic Explorer

Galactic Explorer

ME2: Visit 100% of the planets in an unexplored cluster

75 XP

28.0%

How to unlock the Galactic Explorer achievement in Mass Effect Legendary Edition - Definitive Guide

This can be done in the first Cluster you are started in called the Omega Nebula. You don't need to fully deplete each planets resources, just launching 1 probe is enough. You can buy more probes and fuel at the fuel depot.

Edit: according to ExactBananas launching a probe is not required, only entering the orbit is. Also others have mentioned this not unlocking and being buggy. I'd suggest leaving 1 full system unexplored if this is happening for you that way if a patch fixes it, you can load your save and have one available to use to pop the achievement.
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20 May 2021 15:24

10 Comments
after doing 100% the trophy was unlocked in the lodgings, but the achievement was not unlocked, and after 10 hours of gameplay is still locked cry
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By Heiji Hattori91 on 24 May 2021 03:20
I have the same problem. I've explored 100% of the planets in every cluster in the game so far but the achievement hasn't popped.
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By I Ebon Hawk I on 26 May 2021 01:56
This just unlocked me, and I didn't have to launch a probe to do it either. Just enter the orbit and that's enough for it to be considered 'explored'.
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By ExactBananas on 26 May 2021 08:38
I made an edit with your findings bananas and I also added in that it was buggy
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By REDWINGS05 on 26 May 2021 17:31
I can vouch for @ExactBananas comment - when I went into orbit around the last planet, the achievement popped for me.
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By TheIcemanCometh on 27 May 2021 11:36
Done 4 clusters soon as I could, and nothing.
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By FullMoonBeaver on 29 May 2021 06:51
this achievement also did not pop for me so i deleted my save data from the console started a new save on mass effect 2 completed the first 2 missions and then explored a cluster and it popped.
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By Usman1878 on 29 May 2021 09:24
Still won’t seem to unlock for me, even tried making a new game to no avail.
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By Snapple Cap on 15 Jun 2021 15:37
Just unlocked it, so it’s working in some form now
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By SwordofWhedon on 04 Jul 2021 23:53
I’d fully explored several systems and no luck popping this one until I got to Osun (Hourglass Nebula) and entered the orbit of Pergatory. Happy times!
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By Capt Poopey on 16 Jul 2021 13:33
View all 10 comments Show less comments
You unlock this achievement by exploring every planet in a cluster, most of which include multiple systems with multiple planets. A planet is considered "explored", when you enter its orbit, not when it has been probed.

I've found that the most convenient way to do this is to wait until completing the main story mission Horizon which you unlock after completing the recruitment missions for Archangel, The Professor, and The Warlord.

After completing Horizon and opening the galaxy map, you'll find yourself in the Iera system in the Shadow Sea cluster, which wasn't available before completing the Horizon mission. The Shadow Sea only has a single system, Iera, which only four planets. Visiting all four should unlock the achievement.

If the achievement doesn't unlock you may have encountered a bug. Try closing the game and loading a previous save to try again. You can also try fully exploring a different cluster. As a last resort, a new playthrough may be required.
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09 Jun 2021 15:08

1 Comment
This worked well. Thanks.
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By Time4Aksion on 23 Nov 2023 21:25
There are a number of clusters that can work for this. To raise the percentage of exploration, you simply need to enter the orbit of a planet in the cluster, and repeat for each planet. After recruiting Garrus, Mordin, and Grunt, you'll have access to the Shadow Sea cluster which only has four planets to explore making this one of the quickest by far.
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