Here is the full list of all 50 Shadow Corridor 2 雨ノ四葩 achievements.
Finish the Underworld Academy.
Finish the Corridor of Endless Rain.
Finish Hydrangea Street.
Finish the Mausoleum.
Finish the Shrine.
Finish the Missing Windhole.
Finish the Glass Building.
Finish the Sea of Trees Complex.
Finish the Sea of Reminiscence.
Finish the God Tree.
Finish all stages on the Beginner difficulty.
Finish all stages on the Intermediate difficulty.
Finish all stages on the Advanced difficulty.
Finish all stages on the Deluge difficulty.
Earn a gold trophy in the Underworld Academy in Magatama Challenge mode.
Earn a gold trophy in the Corridor of Endless Rain in Magatama Challenge mode.
Earn a gold trophy in Hydrangea Street in Magatama Challenge mode.
Earn a gold trophy in the Mausoleum in Magatama Challenge mode.
Earn a gold trophy in the Shrine in Magatama Challenge mode.
Earn a gold trophy in the Glass Building in Magatama Challenge mode.
Earn a gold trophy in the Sea of Trees Complex in Magatama Challenge mode.
Earn a gold trophy in the Sea of Reminiscence in Magatama Challenge mode.
Earn a gold trophy in all stages in Magatama Challenge mode.
Run the Marathon Beginner course.
Run the Marathon Intermediate course.
Run the Marathon Advanced course.
Run the Marathon Deluge course.
Get an S Rank for the first time.
Get an S Rank in half the stages.
Get an S Rank in all stages.
Collect half of all Karuta.
Collect all Karuta.
Collect half of all Archives.
Collect all Archives.
Collect half of all Coffee Beans.
Collect all Coffee Beans.
Have Hotaruya gain more than 12,000 souls in profit.
Have Hotaruya gain more than 21,000 souls in profit.
Befriend the Snail of the Underworld.
Take the key from the Mean Noh Mask.
Find the Gold Glittering Sculpture.
Cremate an Apparition with a Two-hole Candle.
Cremate an Apparition with the Sakuikazuchi no Hoko.
Fire all six shots from a '26 Pistol without breaking it.
Try all types of onigiri ingredients.
Get an Apparition to break a locked door.
Successfully run from an Apparition for the first time.
Collect half of all Medals.
Collect all Medals.
Complete 100% of Achievements.