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.
Complete the “A Broken Mindscape” chapter
Complete the episode
Complete the “RSS Recovery” chapter
Enable the suit just before landing
Complete Elea’s optional interactions
Sit on all available chairs & beds
Play basketball and clean the bridge
Pair of sixes
Complete the “Mars Memory” simulation
Martian stalker
Origami pusher
You truly are the master of “blue” screen of death
Get out of the labyrinth for under 15 seconds
Complete the “A Life Full Of Promises” chapter
Enjoy the sauna
Assemble the furniture
Thank you for moon watching
Complete the Prologue chapter