Mass Effect Andromeda Remnant Decryption puzzles are a regular occurrence as you're exploring the game's many Vaults and the Monoliths required to open them.

As you explore the galaxy's many new planets, you'll come across these mysterious structures and the Sudoku-like puzzles that guard your access.

While the rules are fairly straightforward, it's often the last thing you want to do if you're in the mindset to keep adventuring, and while you can bypass these puzzles with 'Remnant Decryption Keys', some cannot be overridden - which is where this guide will come in handy.

If you're after help for parts of the game, consult our Mass Effect Andromeda walkthrough and guide. If you'd like to check out some of the best Mass Effect gifts and gift ideas, though, you can check out our sister site Jelly Deals. They've put together a guide to the best Mass Effect merchandise around.

Remnant Vaults and Monoliths As tutorialised to you in A Better Beginning, you can find and activate Remnant Vaults on a planet by finding the Monoliths on the surface, solving their Remnant Decryption puzzles, then entering and exploring the Vault. Inside you can sometimes expect more puzzles, some platforming and a sprinkling of combat, making them the closest the game has to classic role-playing game dungeons. The rewards for completing them are worthwhile. Not only does exploring each one give you components you can use for crafting, but it'll bump up that planet's viability by 40%, more so than any other side-quest or activity. Mass Effect Andromeda - Voeld: Restoring a World

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Mass Effect Andromeda - Havarl: A Dying Planet It'll also help stabilise the planets atmosphere and make it easier to explore from then on, so they should definitely be on your checklist of activities to prioritise when exploring these new pastures.