Here is the full list of all 35 Return to Grace achievements.
Reached Moon Surface
Found Stone Marker
Examined both Weather Stations
Found Grace Spire
Found source of signal
Escaped the Trap
Ignored Control's instruction
Examined all items in Zen Garden
Held your breath
Discovered evidence of scavenging
Got Transit working
Solved Security Door with no mistakes
Uncovered Everett's identity
Examined Washroom
Used the Beam as a shortcut
Discovered first Wish
Entered the Dark Room
Searched all Rooms
Uncovered story of the Siege
Cast away Device
Crossed Track
Attempted Jump
Confided with Mom
Threw Rocks
Overrode Panel
Became the Keeper
Listened to all Wishes
Played the Theremin
Ruled with Control
Broke into Heaven
Aligned Relay
Reset Relay
Activated Grace
Returned to Grace
Witnessed Allen's fate