Here is the full list of all 16 A SECOND BEFORE US achievements.
Finish the first day
Finish the second day
Finish the third day
Finish the fourth day
Finish the fifth day
Read all records at level 1
Read all records at level 2
Read all records at level 3
Read all records at level 4
Read all records at level 5
Read all records at level 6
Read all records at level 7
Read all records at level 8
Scatter a barricade in a lighthouse
Hit the switch with a stone
Finish the game without loadings