With the Reapers
controlling most of the galaxy, recklessly scanning as you fly around like a
child pretending to be an airplane is a great way to get noticed (and murdered)
quickly. Knowing exactly where to scan will keep Reaper alertness down, and knowing
beforehand what you’ll find is a great way to accumulate credits early on in
Reapers reach full alertness - and subsequently give chase - leave the system
immediately. Reapers are initially slow but pick up speed at an alarming rate
and will eventually catch up. Once the Reapers are alert in a system, you’ll
have to complete one mission before it’s safe to return. However, knowing where
to scan means you can dash in and out, even with the Reapers aware and on your
likely realize, not all clusters can be accessed as soon as the game begins. New
clusters open up as the story progresses or side missions are completed. Others
are not available until a specific quest, such as an N7 assignment, is given to
you by Traynor. We’ve outlined exactly when each new cluster was made available
to us during our playthrough, though it may vary for you depending on your path.
this guide are listed as they appear in the images from left to right.
Locations with no planet at the center signify ship wreckages, which grant
varying amounts of fuel upon investigation.
The Shrike Abyssal
Be sure to check our other Mass Effect 3 guides and walkthroughs:
Mass Effect 3 walkthrough
Mass Effect 3 romance guide
Mass Effect 3 weapons and armor guide