Full list of all 40 Relicta achievements worth 1,390 gamerscore. It takes around 15-20 hours to unlock all of the achievements in the base game on Xbox One.
The base game contains 27 achievements worth 1,000 Gamerscore, and there are 2 DLC packs containing 13 achievements worth 390 Gamerscore.
Complete the prologue
Find a collectible
Find 50% of collectibles
Find all collectibles
Find a PDA data card
Find 50% of PDA data cards
Find all PDA data cards
Complete the first area of De Gerlache
Complete the second area of De Gerlache
Complete the third area of De Gerlache
Complete all puzzles of De Gerlache dome
Complete the first area of Shoemaker
Complete the second area of Shoemaker
Complete the third area of Shoemaker
Complete all puzzles of Shoemaker dome
Complete the first area of Faustini
Complete the second area of Faustini
Complete all puzzles of Faustini dome
Complete the first area of Sverdrup
Complete the second area of Sverdrup
Complete all puzzles of Sverdrup dome
Complete all puzzles of Relicta
Activate the antenna to contact Ragnar
Meet the parasite
Run away with Kira
Stay and wait for Ragnar
Complete Relicta in less than six hours
Complete the first puzzle of the day
Complete four puzzles
Complete eight puzzles
Complete all the puzzles of the day
Finish your shift at Aegir Labs
Use the magnetic abilities for the first time
Teleport yourself to another location
Reactivate the forsaken maglev
Discover the truth about Patel
First look at Nobili Crater
Survive the fall
Reach the spaceport area
Escape from Ragnar