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