Karaoke Revolution
51 Achievements
PS3
Multiplier Madness
Earn a 30x multiplier
36.9%
How to unlock the Multiplier Madness achievement in Karaoke Revolution - Definitive Guide
All you have to do is pick a song that you are good at and build your multiplier to 30. It does not reset everytime you miss a phrase but will grow depending on your performance of the song.
You earn a multiplier by getting the notes/pitch right. Once you are around a third thru career you will certainly have this.