Guitar Hero III
59 Achievements
1,000
Xbox 360
Two by Four
Get an 8X multiplier in a Co-op game
5
How to unlock the Two by Four achievement in Guitar Hero III - Definitive Guide
Maka91
This is a simple achievement. Just get a 4x multiplier in co-op (by stringing 30 notes together) and activate Star Power with your guitar or controller at the same time. It will unlock right away. It may take a few tries though.
