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