Watch Open Graves (2009) : Full Movie Online Free One day, Jason finds an unusual board game called Mamba. When his surfer friends start to play, the games unleashes its deadly curse, killing the losers in a gruesome fashion. Supposedly it will grant the winner a wish. As his companions die off, Jason decides that the only way he can reverse the tragedy is by continuing to play. With his girlfriend, Erica, Jason rolls the dice and hopes to make his wish before one of them suffers a horrible fate.