It’s been four years since “Squid Game” hit Netflix and became a global sensation. On Friday, its ends with its third season.The first and second seasons of “Squid Game” follow Seong Gi-hun, who stumbles upon a competition where debtors play children’s games with deadly twists for the chance to win billions of South Korean won.Hwang Dong-hyuk, the creator of “Squid Game,” told Entertainment Weekly that the final season, which was filmed at the same time as season two, will wrap up Gi-hun’s story, including his battle against the organization that runs the competition.Here’s what to remember from seasons one and two before watching season three.