Here is the full list of all 23 Shapes of Gray achievements.
Reach the end in the second quest’s arcade mode.
Collect 100 coins in the second quest’s arcade mode.
Obtain a score of 1,000,000 in the second quest’s arcade mode.
Reach the end within 4 minutes in the second quest’s arcade mode.
Collect 50 coins in the second quest’s arcade mode.
Obtain a score of 100,000 in the second quest’s arcade mode.
Obtain a score of 500,000 in the second quest’s arcade mode.
Reach the end with 0 coins in the first quest’s arcade mode.
Collect 250 coins in the first quest’s arcade mode.
Collect 100 coins in the first quest’s arcade mode.
Collect 50 coins in the first quest’s arcade mode.
Obtain a score of 100,000 in the first quest’s arcade mode.
Obtain a score of 500,000 in the first quest’s arcade mode.
Obtain a score of 1,000,000 in the first quest’s arcade mode.
Reach the end in the first quest’s arcade mode.
Reach the end within 4 minutes in the first quest’s arcade mode.
See the ending.
Complete the second quest.
Have five hearts at once.
Complete the first quest.
Collect 250 coins in the second quest’s arcade mode.
Reach the end with 0 coins in the second quest’s arcade mode.
Complete every arcade challenge.