Here is the full list of all 16 Pillars of Light achievements.
Keep watching a beautiful item for a long time
Interact with every interactive item in the office
Find the secret passage in the office
Find the first mysterious lever
Find the second mysterious lever
Find the third mysterious lever
Find the fourth mysterious lever
Find the fifth mysterious lever
Finish your training
Find the exit of the jungle temple
Open and enter the secret room
You got out of the sewers
Kill the shadow spider
Run faster than light
Come back from far far away
Finish the game in one run in less than 42 minutes