As I've come to realize, if you want something badly enough, you'll make an effort, but if you care little enough, you'll instead make an excuse. For all its flaws, G4 has the best ending.
This is the story of a bond forged between three fillies and the many trials and tribulations that strengthen that bond as they grow older. Friendship, secrets, and a dark journey awaits.
In the blink of an eye, all life was wiped from the face of Equus by an abomination born of the stars. That is, all except for four immortal Princesses. Now they fight for the only thing they have left other than their grief... revenge.