Had this idea for a category in the back of my head for a long time and after finally discovering how gaining 99 "torture" on the end of level results screen works, and coming up with the absolute SICK category name I think it's finally time to make it a thing
Basically how getting torture works is killing all enemies in a level ANY way possible. Also you must kill at least 3 enemies at every enemy spawner. The rig energy does not count towards torture, so don't worry too much about grabbing it, however it seems that the red rig swings enemies back and forth faster so you can kill enemies a little faster with red rig, which could be useful
So far, the enemies that do not count for gaining torture are the little evil green men/the turrets that shoot them and the green helicopter enemy in Bombopolis. Basically anything that drops rig energy when killed counts towards torture, even the giant guys in Crystal Mine
Be careful not to de spawn enemies in Drench, some enemies thrown in water can disappear off screen and not count (I think?) and the flying enemies can just fly away and never come back
You are allowed to skip the results screen for torture as you gain a continue (or 2 lives in the Japanese version) for doing so which shows in the results screen (sad face no kids cheering for you)