Here is the full list of all 10 Pi is Everything achievements.
Played for more than pi minutes
Played for more than pi hours
Played for more than pi days
Played for more than pi months
Played for more than pi years
Made a tower more than 3.14 blocks tall
Made a tower more than 31.41 blocks tall
Made a tower more than 314.15 blocks tall
Made a tower more than 3141.59 blocks tall
Made a tower more than 31415.92 blocks tall