Guitar Hero III
59 Achievements
1,000
Xbox 360
Millionaire Club
Score 1,000,000 on any song in a Co-op match
20
How to unlock the Millionaire Club achievement in Guitar Hero III - Definitive Guide
Maka91
This will be one of the hardest co-op achievements. You pretty much need to do "Through the Fire and Flames", "One" or "Number of the Beast" on Expert (both) and you can't miss many notes. Yes, ouch is the right word!
