Guitar Hero Aerosmith
49 Achievements
1,000
15-20h
Xbox 360
When I Needed You
You successfully activated Star Power 3 times in a Co-op song
15
How to unlock the When I Needed You achievement in Guitar Hero Aerosmith - Definitive Guide
This one can be tricky. During a co-op song, best with a buddy, you need to collect start power and activate together 3 times in one song. It is easier to do on easier difficulties.
This achievement requires you and your co-op partner to access Star Power 3 times in a song. Pretty simple. Just get your bar half full (till it glows) and both tilt your guitars (repeat two more times).