For this achievement you want to sacrifice all four survivors on hooks before five generators are done. This means you can't kill them with a mori or through perks/abilities like Devour Hope or The Pig's Reverse Bear Traps.
Also you cannot shut the hatch, doing so counts as the generators being powered and nullifies any achievement progress. You won't get progress if you close the hatch while the last survivor is going through the death animation either, so just fight the urge to stomp it shut.
A good tip is once you're down to two remaining survivors, just down the first but don't hook him until you've found the other. If you don't the last survivor might find the hatch by himself and escape.