Hayajin

Tekiya is a gambler who is your character. One day, Tekiya gambles all of his money away and needs to take out a loan with the Yakuza but cannot afford to pay them back so he must kill them all in order to live, granting him a life without an early death. There are 3 rules he must follow in order to not die in the process of killing the Yakuza. 

Rule 1: You cannot go backwards as he cannot undo what has been done. 

Rule 2: He cannot hide from them as he must face the Yakuza eye to eye.

 Rule 3: He must kill them and not die in the process.