The "Cell Games" is a major tournament arc in the anime and manga series Dragon Ball Z. It features the villain Cell, who is a bio-engineered creature with the ability to absorb other beings to increase his power. Cell challenges the strongest fighters on Earth to a series of battles, promising to spare the planet if he is defeated. The tournament introduces several key characters, including Goku, Vegeta, and Gohan, who all participate in the fights. The arc showcases intense battles and character development, particularly for Gohan, who ultimately plays a crucial role in defeating Cell.