PONG IS THE OG!
Remember playing pong for hours? We had those Atari football and basketball for the car--but PONG? It was it's own unit hooked up to a tv in our kitchen...it was a big kitchen at the time.
We played for hours, like to the point my neck hurt. It wasn't until Tetris came out that I played anything so long that it caused me pain.
Here's the website--granted, you may get fired. Don't blame me. Enjoy!