Here is the full list of all 8 Auto Clicker achievements.
Run the standard clicker for the first time.
Run the advanced clicker for the first time with at least one block.
Run the recording clicker for the first time with at least one click recorded.
Execute 100 clicks.
Execute 1,000 clicks.
Execute 10,000 clicks.
Execute 100,000 clicks.
Execute 1,000,000 clicks.