Here is the full list of all 12 Pid achievements.
Find 30 secret areas.
Collect 5 secret souvenirs.
Find 10 secret areas.
Defeat the Butler Orlando.
Find a secret constellation.
Collect 1 secret souvenir.
Enter the entourage HQ.
Complete the game.
Complete game on hard difficulty.
Find all the secret constellations.
Complete the game with all 12 secret souvenirs.
Find 60 secret areas.