To unlock the Angelic Quarma Ending, beat the game with the Quarma Bar filled higher than 75%.
To unlock the Bad Quarma Ending, beat Level 23 with the Quarma Bar filled less than 50%.
To unlock to Neutral Quarma Ending, beat the game with the Quarma Bar filled between 50% and 75%.
Try to posses enemies as much as you can, it makes the game much easier like in the mudakun fortress level get a guy with a gun.
HINT: On the third-from-last level, "The Loading Bay" where there are four Interns marching around a platform with a loading chute. Instead of having to sneak around them a million times risking Munch's hide, create a possession orb with the four spooce you got from the scrubs. Possess one of the Interns and shoot the others from the BEHIND and kill them. When your done, erm... dipose of the Intern and enjoy the rest of the level. ( Or Try To)
As soon as you jump out of the water, immediately press (A) when you see Munch's headport.