A killing society. Not based on abduction or memory loss, but sheer want. What if people could participate in a government project in which the winner of the killing game would be granted their one desire, whether it would be ironic or very real. Every student goes in with clear murderous intent, and they all know the other person is ready to kill. See it as risk-management and social engineering: the game.

All trials will be based on trust/distrust. Everyone in this killling class is your enemy. However, the enemy of your enemy is your friend. And thus you must see towards coöperating with those you will plan to murder and whom also want to murder you eventually. Perhaps you will question the killing game, perhaps you will form meaningfull relationships with other students after which you must engineer the killing game towards their survival including your own.

The story should end with the path of your choosing: Killing a classmate, saving a classmate or stopping the killing game in its tracks and seeking the truth behind this "government project"

And so, the story would have more branches based on the playertype.