Spelunker HD
74 Achievements
0-0h
PS3
Master Ghostbuster
Got rid of 100 ghosts. Details for this achievement will be revealed once unlocked
10.6%
How to unlock the Master Ghostbuster achievement in Spelunker HD - Definitive Guide
This should come somewhere midway through your first playthrough. There will be more than enough to get you the trophy. Just kill all ghosts you come across. This is made even easier as some ghosts split into six smaller ghosts when you first attack them.