This achievement is
MISSABLE. However, it has been claimed by some that any you miss on your first playthrough can be solved on New Game+ and the achievement will unlock when you've accumulated 20 total. I can't verify this though so if you missed the cheevo on your first playthough I would advise solving all of them on NG+ until it unlocks (not just the ones you think you needed to get 20 on your first run).
This is the count:
Total: 22 Missable: 6
There is one MISSABLE puzzle in the main vault of each planet except for H-047C (which has no vault).
Even though the acheivement itself does not progress, you can check this in-game. Go to Menu - Skills - Press
- Select Accomplishments - Scroll to the bottom. (credit: elKamikazeSquid)
Some players have reported that certain puzzles haven't been counting for them. I would advise saving before completing each puzzle and then checking the in-game tracker afterwords to make sure it counted. If not, reload and try it again. Also, there's debate about whether using Remnant Keys will count or not so I would also advise not using them.PowerPyx has put together a great guide for locations/solutions of Remnant Puzzles. All credit is his.
http://www.powerpyx.com/mass-effect-andromeda-glyph-puzzle-s...Below I'll list a very general description of the planet/quest location to use for keeping track of which you've solved:
Eos1- Story related, can't miss it.
2- In vault,
MISSABLE!
3- Additional Task: Data Trail (or Free Roam)
4- Additional Task: The Ghost of Promise (or Free Roam)
Voeld1- Ally Quest: Peebee's Secret Project
2- Heleus Quest: Restoring a World (1st monolith)
3- 2nd monolith
4- 3rd monolith
5- In vault,
MISSABLE!
6- Additional Task: Subjugation (or Free Roam)
Havarl1- Story related, can't miss it. (Helping Havarl's Scientists)
2- In vault,
MISSABLE!
3- Free roam. (Only available after Havarl vault is completed)
Kadara1- A vault monolith
2- In vault,
MISSABLE!
Elaaden1- Northernmost monolith
2- In vault,
MISSABLE!
3- Heleus Quest: Investigate the Remnant Derelict
4- Additional Task: Cache Flow (or Free Roam)
5- Free roam
H-047C1- Heleus Quest: The Remnant Tiller
Khi Tasira1- Priority Ops: The Journey to Meridian,
MISSABLE!