Ghostly Matter achievements

Find the plasma rifle

Find the Taser

Defeat the sub-demon of Tungl

Find the two parts needed to make up the Anti-Demon Kit

Defeat the Gravedigger

Complete the prologue

Find the Ancient Amulet of Fate Power-Up

Break all five seals in the Cursed Temple

Discover the laboratory's password using the Polterscope

Find the Grimoire Power-Up