Here is the full list of all 16 Hektor achievements.
Play through the whole game without consuming any drugs.
Play thourgh the whole game without using any batteries.
Get hit by the Predator 5 times without dying.
Get screamed at by the Ghast 3 times.
Get killed by the Predator more than 3 times.
Collect all the meatball cans.
Collect all notes in a single playthrough.
Complete game without using the Lighter or the Flashlight.
Pull the Lever in the wrong direction 5 times.
Get strangled by the sniper more than once in Dream II.
Complete the game in under one hour.
Turn off the water in under 1 minute in Dream I.
Complete the game without taking any damage.
Remain in constant motion for 5 minutes.
Consume 100 pills.
Pick up 100 items.