Here is the full list of all 100 Whispering Lane: Horror achievements.
Welcome to Whispering Lane
Find any rewind tag
Play on easy difficulty :-)...
Play on normal difficulty
Play on nightmare difficulty
Play Walking Simulator mode
Find first the GhostSeeker's note
Discover the first note about the "House"
Uncover the inaugural note regarding the "Fearstalkers"
Unveil the primary note concerning the "Watcher".
Unearth the initial note pertaining to "Fear"
Uncover the conclusive message
Find a postcard...
Complete the prologue of the Ghostseeker, a streamer exploring a haunted house.
Complete the Haunted House chapter.
Leap into the unknown through the doorway to find only a tunnel or hole, and take the plunge from a great height.
Witness the horrifying transformation of the once-innocent house into a grotesque, living organic nightmare, oozing with biomass, blood, and dread.
Defeat the first boss
Defeat the second boss
Complete the game to unlock Last Hope mode
Shhhhh... It's top secret!