Here is the full list of all 16 Hektor achievements.
Remain in constant motion for 5 minutes.
Complete the game without taking any damage.
Play through the whole game without consuming any drugs.
Play thourgh the whole game without using any batteries.
Collect all notes in a single playthrough.
Pick up 100 items.
Pull the Lever in the wrong direction 5 times.
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.
Collect all the meatball cans.
Complete game without using the Lighter or the Flashlight.
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.
Consume 100 pills.