Here is the full list of all 37 Skater Cally achievements.
Break 20 Bones during a Bail
Complete the Tutorial
Unlock Zone 2: City Streets
Unlock Zone 3: School
Unlock Zone 4: City Park
Unlock Zone 5: City Streets
Unlock Zone 6: City Streets
Unlock Zone 7: Y Games Park
Complete all the goals in Zone 1
Complete all the goals in Zone 2
Complete all the goals in Zone 3
Complete all the goals in Zone 4
Complete all the goals in Zone 5
Complete all the goals in Zone 6
Complete all the goals in Zone 7
Successfully complete every type of Fliptrick
Successfully complete every type of Grab
Successfully complete every type of Grind
Successfully complete every type of Special Trick
Successfully Land a 100000 Point Combo
Successfully Land a 1000000 Point Combo
Break 30 Bones during a Bail
Score 2 Million Points during a Freeskate Run
Score 10 Million Points during a Freeskate Run
Freeskate the Entire Game in One Session
Unlock Zone 8: Y Games Park
Complete all the goals in Zone 8
Break 40 Bones in a Bail
Break 50 Bones in a Bail
Break 60 Bones in a Bail
Break 70 Bones in a Bail
Break 80 Bones in a Bail
Break 90 Bones in a Bail
Break 100 Bones in a Bail
Break 1000 Bones in your Skater Cally Career
Break 2500 Bones in your Skater Cally Career
Score One Billion Points in your Skater Cally Career