Pong

Pong is a video game seen at Barney's Bowlarama.

History
The game could be seen when Mr. Burns took Gloria to the Bowlarama on a date.

A version of the game, titled "Pong '95", was seen in the Bowlarama when Homer and Marge snuck in after being kicked out of Springfield.

The game was at Noiseland Arcade when Homer was 10 years old.

After the electricity gets cut out by Homer at the Conflict of Enemies world championship, Pong is one of the games shown.

Non-canon
When the Simpsons traveled into space, Kang and Kodos showed them their achievement in amusement technology - an electronic version of table tennis. Bart told then to them that it's just Pong, and Homer said that he played it with Marge before they got married.

Behind the Laughter
 is a real video game.