From the introduction:
Mortal Tears is a Live Action Role-Play game (LARP) focusing on immersive role-play that is not hindered by complicated rules. As a matter of fact, you will find the rules incredibly simple and easy to learn. The rules contained herein are completely unique to Mortal Tears. The World of Darkness is merely a game world setting to play a character in.
The World of Darkness is a world filled with hideous monsters and monstrous humans. Despite this, the real Darkness comes from within, making Personal Horror the theme of the game. Whether you are a vampire fighting the Beast, or a werewolf fighting the Wyrm, your decisions and actions could save you, or drag you into corruption and evil.