Here is the full list of all 15 Higurashi When They Cry Hou - there are Ch.2 Watanagashi achievements.
Figure out the twins.
Get rescued.
Get an unexpected delivery.
Meet Shion.
Finish a Sunday of fun and games.
Help set up for the festival.
Discover what's in the storehouse.
Form an alliance.
Go home already.
Demand the truth.
Twisted Sisters
Complete Watanagashi.
Read all TIPS in Watanagashi.
Enjoy Watanagashi's after-party.
Learn the truth.