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