Here is the full list of all 10 Year Walk achievements. It takes around 1-2 hours to unlock all of the achievements on Windows.
Year walk on New Year's eve.
Do a full year walk in 20 minutes.
A mysteriously modern rune.
Do a full year walk without looking at the map.
Do a full year walk without uncovering the secrets of the rune and the doll. The grim will visit your dreams.
MYL1NGBRO0KHORSEN1GHTRAVENHULDR4
The owls sing a song that they learned in the lobby of a castle on a remote island.
A three letter word in the dark. Without it, it's silent.
48, 30, 42, 30, 18
Do a full year walk without any hints.