Gegeru (ゲゲル Gegeru) is a ruthless game for the Gurongis. They played this game by killing humans for fun, and the winner of this game will challenge the N-Group Gurongi for leadership. Gegeru is organized and judged by Ra group. The final contender has right to challenge N group for the title of the leader in Final Gegeru (Zagibasu Gegeru). Each group is operating under certain rules and members are competing each other to enter Final Gegeru. Gegeru is also a chance to promote a member to higher ranks (Zu will be promoted to Me, etc). Ra group are responsible to decide the players and their killing numbers. Ra-Baruba-De is tasked to authorize a member of Gurongi Tribe to enter the game. Ra-Dorudo-Gu is tasked to count their victims with his abacus-like tool, Bogunda.