Tug-o-war

Death:

Gryffindor: "You know what? I work alone! I never work in teams! I am an individual! I am my own person!!" *Gets shot by a pink soldier for not obeying the teamwork rules

Hufflepuff: Not enough arm strength

Ravenclaw: "Take three steps forward! We need to make them fall!" *Doesn't work 

Slytherin: Ditched by Gryffindor and Ravenclaw's plan didn't work

Survive:

Gryffindor: "We need to work as a team!!"

Hufflepuff: Enough arm strength

Ravenclaw: "Take three steps forward! We need to make them fall!" *Works 

Slytherin: Do I really have to say?