Puyo Puyo

Puyo Puyo (ぷよぷよ) is a series of tile-matching video games created by Compile. Sega has owned the franchise since 1998, with games being developed by Compile. Puyo Puyo was created as a spin-off franchise to Madō Monogatari (Sorcery Saga), a series of first-person dungeon crawler role-playing games by Compile. The characters from Puyo Puyo originated from Madō Monogatari. As of 2018, the series has sold over 56 million copies worldwide since Sega obtained the rights.

Gameplay
Generally, the objective of Puyo Puyo games is to defeat all opponents in a battle by causing the third spot from the left in the top row to become occupied by something that does not immediately leave. Puyo are round, slime-like creatures who, in most variations of the game, fall from the top of the screen in groups of two, three, and four. The piece can be moved, dropped, and rotated using the controller or joystick. The piece falls until it reaches another Puyo or the bottom of the screen. When four or more Puyo of the same color line up adjacent to each other, the Puyo will connect to each other, "Pop", and disappear. Puyo of the same color can connect horizontally or vertically, but not diagonally.

The Puyo above those that are cleared fall onto other pieces or the bottom of the screen. Simultaneous Pops (同時消し, simultaneous erasing) are created when more than one group is formed at a time.

A Chain is made when falling Puyo cause a new group of Puyo to Pop, making a chain reaction. When a Chain is achieved, Nuisance Puyo, or Ojama Puyo (お邪魔ぷよ, hindrance Puyo) are sent to either clog the opponent's screen or to cancel out (offset, 相殺) the Nuisance Puyo sent by the opponent. Nuisance Puyo are translucent pieces that disappear when Puyo are popped next to them. If multiple groups of Puyo are cleared in succession due to a chain, the amount of Nuisance Puyo will increase based solely on the number of steps in the chain. Nuisance Puyo are cached above the opponent's playing field, and do not fall until the attacker's chain concludes, and then the defender puts down a piece. Nuisance Puyo block the opponents' playing fields, and can cause them to lose if one is placed the third spot from the left in the top row.