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