Here is the full list of all 26 Runner2: Future Legend of Rhythm Alien achievements worth 400 gamerscore.
Triple Perfect+ed the entire game. Holy crap!
Completed all 90 Rewards.
Beat all levels on hard. That's something!
Triple Triple Perfected once in each World.
Double Double Perfected once in each World.
Completed 80 Rewards.
Back on track to your FATE.
Perfect Runned each level.
Got 5 Perfect+s, one in each World.
How did you manage to get through the Mounting Sadds?
Completed 70 Rewards.
Evolved past the Supernature.
Completed 60 Rewards.
Mucked through the Emerald Brine.
Completed 50 Rewards.
You warned the Athenians of the oncoming Persian army!
Beat 30 levels as alternate characters. Way to go!
You got the fever and danced 100 times.
Completed 40 Rewards.
What were those giant things in the background of World 1? You are pretty sure you have no idea.
Completed 30 Rewards.
You made a new friend.
Completed 20 Rewards.
Perfect+?! That's unpossible!
Completed 10 Rewards.
Checkpoints are for suckers!