Today is World Tetris Day

Today is World Tetris Day. It’s also the game’s 30th birthday. Let’s celebrate.

• Here’s a history of Tetris on The Guardian.
• Here’s a video of Tetris on the Cira Centre — the biggest video game in the world — during Philly Tech Week 2014.

• And, if you’re so inclined, here’s where you can play Tetris online.