Here is the full list of all 11 The Wake: Mourning Father, Mourning Mother achievements.
"+ 2"
"adding two"
"the funeral"
"the only side dish / number of lunchbox compartments"
"all of page 28 / +28"
"the date was clearly written somewhere"
"the list repeats"
"y=3x+2"
"father is proud of him not me"
"plus two"
"the key used to encrypt chapter 9"