Tetra is a falling-blocks puzzle in the style of a 1980s arcade cabinet: bold red, yellow and blue pieces on a black screen and a menu you steer with a blinking cursor. Rotate and slide the seven shapes so they complete rows; full rows disappear, and the round ends when the stack reaches the top.
Arrows move, Up rotates, Space drops and C holds; on a phone use the buttons beside the well or drag and flick on the board. For other classic versions open Tetris Classic or Good Old Tetris.
