Tetris: Difference between revisions

The goal of the game is to stack blocks into complete lines, removing them from play. All of the blocks, called Tetriminos<ref>"About Tetris®." ''Tetris'', tetris.com/about-us. Retrieved January 26, 2017.</ref>, are based on the {{wp|tetromino}}s (every geometric shape that can be created from four perfect squares). As play begins, a random Tetrimino falls to the bottom of the screen, and the player can position it and rotate it without being able to move it back up. After one is placed down, another appears, and this continues for every subsequent Tetrimino. In single-player, the player can choose from the A-Type or B-Type modes to play. In A-Type, the player selects the speed at which the Tetriminos fall, then the game begins. It continues forever<ref>Spectre255. "Game Boy Tetris - 999,999 Points." ''YouTube'', 13 Mar. 2006, www.youtube.com/watch?v=keeSEJG4XzU. Retrieved January 26, 2017.</ref> until the Tetriminos reach the top of the screen, with no more room left for them to appear. In B-Type, the player must clear twenty-five lines, and in this mode, they can choose both the Tetrimnos' falling speed and the number of misaligned blocks that are already on-screen. Once the necessary lines have been cleared, the player is scored on their performance. If they complete B-Type with the maximum settings, a special ending plays featuring the launch of a spaceship.