This T tetromino rotates infinitely as long as the player does not wait half a second between moves.
Infinite Placement Lock Down, also known as Infinity, Easy Spin, or infinite spin refers to a feature in many Guideline-compliant Tetris games. The feature allows the player to move and rotate the Tetrimino infinitely without it locking down. (This also applies to the O-piece, which does not rotate visually.) This allows the player to keep the Tetrimino "alive" forever. The term Infinity (Japanese:インフィニティ) has been seen mostly in the official documentation of Japanese games, and used by developers. In Tetris Worlds, where the feature first appeared, the feature was called Easy Spin within the game. The feature usually appears alongside SRS.
In a few console games such as Tetris Advance, Tetris: New Century and the GameCube and Xbox versions of Tetris Worlds, the feature can be turned off. Turning Infinity off in Tetris: New Century will revert the game to a step reset lock delay behavior. The feature can also be applied to other rotation systems as well, for instance in Tetris The Grand Master Ace it can be seen applied to the TGM rotation system.
Move Reset[]
Extended Placement Lock Down, also known as move reset, is a feature in some Guideline-compliant games used to allow the player to move and rotate the Tetrimino about the floor without allowing them to do it infinitely. This system applies a cap to the amount of lock delay resets that can occur (usually 15), and is reset upon the Tetrimino moving down to a new line. Move reset is often used in situations like competitive or arcade play, where allowing the player to move and rotate the Tetrimino infinitely is undesirable.
Step Reset[]
Classic Lock Down, also known as step reset, is a system in which lock delay is only reset upon the Tetrimino moving down to a new line. It is the system used in many of the games in the TGM series.
Criticism[]
Ryan Davis of GameSpot wrote in his review of Tetris Worlds that infinity "actually breaks Tetris".[1] Mike Nowak of the-inbetween.com wrote the same thing about Tetris DS.[2] It has also been parodied on YTMND.[3]