Here is the full list of all 15 Higurashi When They Cry Hou - there are Ch.6 Tsumihoroboshi achievements.
Overcome a tragedy.
Had a chat with Ryuukishi07.
Read all TIPS in Tsumihoroboshi
Get the very distinct feeling that something bad is going to happpen.
Accuse a friend of a horrible crime.
Realize how deep the conspiracy really goes.
Make the decision to run.
Be drawn further into the conspiracy.
Believe in a conspiracy.
Be forgiven.
Find an easy solution to a big problem.
Accidentally uncover a horrible truth.
Reminisce on the past.
Meet with someone unpleasant.
Participate in the grand melee.