It is based on the United Kingdom series Ant & Dec's Gameshow Marathon which aired on ITV in 2005.

This program was recorded at Stage 46, CBS Television City in Los Angeles, CA, USA.

[1] The seven-part game show tournament featured celebrity contestants Lance Bass, Paige Davis, Tim Meadows, Kathy Najimy, Leslie Nielsen, and Brande Roderick.

The six played The Price Is Right, Let's Make a Deal (the only show which had not previously aired on CBS at that time), Beat the Clock, Press Your Luck, Card Sharks, Match Game, and Family Feud to progress in the tournament.

Each installment began with a narration of the format of the particular show featured on that episode coupled with montages of clips from each program's history.

The Press Your Luck episode was dedicated in memory to its host Peter Tomarken, who died in a plane crash shortly before Gameshow Marathon premiered.

Lance Bass became the next semifinalist from Let's Make a Deal, and Paige Davis won the Beat the Clock installment.

Kathy Najimy won the last semifinal slot on Press Your Luck, and Tim Meadows and Leslie Nielsen were eliminated at the end of that episode.

The Match Game installment also featured Adam Carolla, Adrianne Curry, George Foreman, Kathy Griffin, Bruce Vilanch, and Betty White (in her traditional seat) as the panel.

For The Price Is Right, the top prize for Plinko was $100,000 and featured the same layout as seen in prime time episodes with a $20,000 slot in the center.

The celebrity who won the most advanced to Finalists' Row and their prizes were awarded to a home viewer.

The winner after Round 3 moved on to the Super Match for a chance to win up to $50,000 for a home viewer.