Trophies

TRAITOR!
you had been a good person, but in the end you had united to the evil Domger

Hero
you saved the world from evil

work alone
I think it's pretty obvious what you need to do

A+ in History
you had recollected all the hidden notes about your ancestors and their achievements

Myth
you completed the game in the maximum difficulty, with no partner(s), no objects,
no checkpoints and dying 0 times