Rock Band 2
50 Achievements
1000
60-80h
Xbox 360
The Final Countdown
Unlocked an Impossible Challenge
15
How to unlock the The Final Countdown achievement in Rock Band 2 - Definitive Guide
Maka91
TrueAchievements
TrueAchievements
Play challenges starting from tier 1, until you unlock the last tier.
Beating a song on a tier unlocks the next tier above it. If you beat a challenge in Tier 2, you will unlock Tier 3.
After beating a challenge on the 2nd last tier, it will unlock this achievement and the final tier.
Beating a song on a tier unlocks the next tier above it. If you beat a challenge in Tier 2, you will unlock Tier 3.
After beating a challenge on the 2nd last tier, it will unlock this achievement and the final tier.
TooMuchCowbell
You just have to play through the challenges of a certain instrument until you unlock the last challenge, the Impossible Challenge. This is comprised of the hardest songs for that instrument.
legndorock
Make your way from the bottom of the challenge tier to the top. Just keep playing until you unlock and impossible challenge. You dont have to unlock it on expert you can unlock it on any difficulty you want to.
Stratege
stratege.ru
stratege.ru
This guide was translated automatically. Show original
You need to complete all the "challenges" for one instrument and at the end you will unlock the "Impossible Challenge". All the most complex compositions for this instrument are included in it.