Here is the full list of all 17 GyroSphere Trials achievements.
Earn 5 points on all arena 1 levels
Earn 5 points on all arena 2 levels
Earn 5 points on all arena 3 levels
Earn 5 points on all arena 4 levels
Earn 5 points on all arena 5 levels
Earn 5 points on all arena 6 levels
Earn 5 points on all arena 7 levels
Earn 5 points on all arena 8 levels
Earn 5 points on all arena 9 levels
Unlocked Arena 2
Unlocked Arena 3
Unlocked Arena 4
Unlocked Arena 5
Unlocked Arena 6
Unlocked Arena 7
Unlocked Arena 8
Unlocked Arena 9