Here is the full list of all 14 Higurashi When They Cry Hou - there are Ch.8 Matsuribayashi achievements.
Had a chat with Ryuukishi07.
Read all TIPS in Matsuribayashi.
Finished the final battle.
Preparations complete.
Even more preparations!
Continued preparations.
Began preparations.
Welcome a new student.
Completed the puzzle.
Finished the prologue.
Experienced a memory of punishment.
Got one step closer.
Experienced a memory of escape.
Went beyond.