Gamers play Tetris on the side of a skyscraper

The 29-story Cira Centre in Philadelphia plays host to what is believed to be the biggest display for the classic game ever.

Chris Matyszczyk

You could do this for days. TechSoftZoneFiveVB/YouTube screenshot by Chris Matyszczyk/CNET

I have friends in Philadelphia.

They complain there's not a lot to do there. Why, one even took his girlfriend to "Phantom Of The Opera" last week. I hope they're still together.

How wonderful, then, that Philadelphia on Saturday saw perhaps the biggest game of Tetris ever, there for all to enjoy.

On the side of the 29-story Cira Centre were LED lights, which you could control just like the Tetris you might still have on your handheld device. Well, almost.

As the Associated Press reports, game boys and girls turned up to play something on a scale that Tetris management say has never been seen.

Here was 100,000 square feet of gaming screen.

It was created to celebrate Philly Tech Week and was the brainchild of Frank Lee, an associate professor of digital media at Drexel University.

"This project began as a personal love letter to the games that I loved when I was a child," he said in a speech. "Pong last year, Tetris this year. But it ended up as a way of uniting the city of Philadelphia."

It's not always easy to unite the city of Philadelphia, save in its criticism of the 76ers and its affection for certain cheeses.

This, then, is a considerable achievement.

Still, what might possibly be next? PacMan?