Hundreds of cash-strapped players accept a strange invitation to compete in children's games. Inside, a tempting prize awaits with deadly high stakes: a survival game that has a whopping 45.6 billion-won prize at stake. Starring: Lee Jung-jae, Greg Chun, and Lee Byung-hun Directed and written by: Hwang Dong-hyuk Check out the video above and find out how many pools of blood it received…