Tetris is a computer game that has been around since 1985 and has appeared on many platforms since then. It is one of the best selling computer games of all time.

Fundamentally is is quite a simple game. The player completes horizontal lines along the bottom of the screen by fitting together shapes that descend from the top of the screen. Completed lines disappear, earning the player points. The game ends when the uncleared lines reach the top of the screen.

Build your own Tetris is available with a project breakdown on Coding Challenges.