of Speed, however the Windows version doesn't include it. Sequels and remakes Bushnell felt the best way to compete against imitators was to create better products, leading Atari to produce sequels in the years following the original's release: Pong Doubles, Super Pong, Ultra Pong, Quadrapong, and Pin-Pong. The sequels feature similar graphics, but include new gameplay elements; for example, Pong Doubles allows four players to compete in pairs, while Quadrapong—also released by Kee Games as Elimination—has them compete against each other in a four-way field. Bushnell also conceptualized a free-to-play version of Pong to entertain children in a Doctor's office. He initially titled it Snoopy Pong and fashioned the cabinet after Snoopy's doghouse with the character on top, but retitled it to Puppy Pong and altered Snoopy to a generic dog to avoid legal action. Bushnell later used the game in his chain of Chuck E. Cheese's restaurants. In 1976, Atari released Breakout, a single-player variation of Pong where the object of the game is to remove bricks from a wall by hitting them with a ball. Like Pong, Breakout was followed by numerous clones that copied the gameplay, such as Arkanoid, Alleyway, and Break 'Em All. A 3D platform game with puzzle and shooter elements was reportedly in development by Atari Corporation for the Atari Jaguar in September 1995 under the title Pong 2000, as part of their series of arcade game updates for the system and was set to have an original storyline for it, but it was never released. In 1999, Hasbro Interactive released a new title known as Pong: The Next Level for home computers and the PlayStation. This game was released as part of a trend within the time period of popular arcade games being remade with 3D graphics and art styles. The game also featured many power-ups. In 2012, Atari celebrated the 40th anniversary of Pong by releasing Pong World for iOS, which was developed by zGames. In 2020, a new game titled Pong Quest was developed by Chequered Ink and released by Atari on Steam, PlayStation 4, Xbox One, and Nintendo Switch. A remake of Pong has been announced for release exclusively for the Intellivision Amico. In popular culture The game is featured in episodes of television series including That '70s Show, King of the Hill and Saturday Night Live. In 2006, an American Express commercial featured Andy Roddick in a tennis match