Here is the full list of all 19 Elea achievements worth 1,000 gamerscore. It takes around 3-4 hours to unlock all of the achievements on Xbox One.
Thank you for moon watching
Complete the Prologue chapter
Assemble the furniture
Complete Elea’s optional interactions
Enjoy the sauna
Complete the “A Life Full Of Promises” chapter
Get out of the labyrinth for under 15 seconds
You truly are the master of “blue” screen of death
Complete the “A Broken Mindscape” chapter
Sit on all available chairs & beds
Play basketball and clean the bridge
Enable the suit just before landing
Martian stalker
Origami pusher
Complete the “Mars Memory” simulation
Pair of sixes
Complete the “RSS Recovery” chapter
Complete the episode