Today marks the 25th Anniversary of Tetris, the classic puzzle game made by Alexey Pajitnov in Russia.

This documentary explores the Tetris Effect and the history of the popular game, explaining how Henk Rogers discovered the game at a Las Vegas trade show and went on to license it from the Soviet government.

The video is a must watch if for no other reason than to see Rogers and Pakitnov in those awesome hats.

Happy Tetris Day everyone!!!