Secret "X" is a game based on Tic-Tac-Toe but without the Os, only Xs.
- The centerpiece of Secret "X" is a large tic-tac-toe board. The middle column of the board contains a secret X hidden in one of its three boxes. To win a prize, the contestant must get three Xs in a row horizontally or diagonally.
- The contestant is given a free X to place anywhere they want in the left or right columns of the board. The contestant is then shown two small prizes one at a time, each with two prices displayed. If the contestant picks the correct price, they win the small prize and earn an additional X, which they then place on the board. Once both prizes have been played, the middle column of the board flips over, revealing the location of the secret X. If the secret X completes a string of three Xs in a row, the contestant wins. A winning row of three must include the secret X, and contestants are not allowed to place all three of their Xs on the same side of the board to create a vertical row (although this is no longer explicitly stated).
- If the contestant earns no additional Xs, the game is automatically over. However, even if they earn both additional Xs, the contestant can still only form a row with two of the three secret squares and is not assured victory.
- Contestants are often discouraged if they attempt to place an X in the middle row because such a placement can only win with one possible secret X position, the center. The same can be accomplished by placing Xs in vertically-opposite corners; this also allows a third X (if won) to also complete the top or bottom horizontal row, which is not possible with the middle-row placement.
- Secret "X" premiered on September 14, 1977 (#2473D) and was created by former producer Kathy Greco, who was then a production assistant on the show. It premiered on the same day as the now-famous incident involving contestant Yolanda Bowersley's tube top falling when she was called to "Come on Down". On its first playing, contestant Betty Vasquez put the first-ever free "X" in the middle of the left column, so the only way she could win was for the Secret "X" to be in the middle. She then guessed both small prizes wrong and therefore lost right away with no additional "X"s. Bob did, however, reveal the center column to find out where the Secret "X" was, after learning that he had to push a button to reveal not knowing it. On its second playing, the game received its first win.
- When the game made its debut in 1977, there were no question marks in the center column; they were added presumably on October 26, 1977 (#2533D). On February 12, 1981 (#3994D) the white parts of the setup became yellow. On October 10, 1986 (#6215D) the clear background of the Secret "X" logo changed to yellow, the white border turned red and the red base became black, also the small prize podiums were also revised completely. The black stripes in the corners were removed on November 4, 2004 (#3034K). The font on the choice prices and the actual prices changed to Kingpin on November 27, 2007 (4102K, aired out of order on November 5).
- One notable playing on March 7, 1995 (#9492D) featured some technical difficulties. The machine was stuck as Bob pushed the button, and he called out to Roger Dobkowitz for help, at first trying to get into the black tarp at the back of the board and crank the middle column manually, but did not help. As a result, Bob and Roger turned the board around and looked behind the black tarp at the back of the board to find out where the Secret "X" was. It was on the bottom, and contestant Lisa lost.
- On another playing from December 4, 1998 (#0925K), an error occurred in which the prices, both the choices and the ARP were reversed on both prizes. After guessing the first small prize wrong and the second one right - and trying to get three in a row on top, everyone realizes the error on pricing the small prizes, and so the only thing to do was to award him the prize, but Bob checked to reveal the center column anyway, and he would not have won since the Secret "X" was in the middle, but he might have put second "X" on the bottom on the bottom right as Bob said it.
- Another notable playing, from April 27, 1999 (#1102K), featured contestant Amy Derose who was clueless about the game and tried to get three in a row on the left column. She first placed her free “X” in the middle left, then placed her second on the top left after getting her first small prize correctly. But she guessed the second prize incorrectly, resulting in an instant loss, but Bob pushed the button to reveal the center column, and the Secret “X” was in the middle.
- On February 14, 2014 (#6615K), a trip to Cancun for 22 people worth $33,000 was offered and won.
- On March 30, 2016 (#7473K), contestant Gary Miller put his free X in the middle of the right column, effectively meaning that he could only win if the X was in the middle. He won the 2nd 'X' and then Drew went ahead and played out the game for the 3rd X, even though, at that point, it didn't matter where Gary put it. The X was indeed in the middle, and Gary's unorthodox strategy worked.
- On May 5, 2016 (#7524K), contestant Erica Green guessed both small prizes wrong. She only had the first X, so she had no chance of winning. The same happened to contestant Floriane Siegel on November 24, 2015 (#7302K), and to contestant Toni Alicante on February 17, 2017 (#7815K), as well as contestant Bryan Kym on March 21, 2017 (#7862K), and to contestant Lily Cao on December 17, 2015 (#7324K).
- On October 28, 2016 (#7665K), Secret "X" was played for a cash prize of $15,000, in honor of Price's Big Money Week, and was won.
- On November 15, 2016 (#7692K), contestant Ben had correctly guessed both small prizes, but still lost the game, which spoiled a perfect show.
- The most number of times this game was played in any season was 36.
- A vertical tic-tac-toe counts as a win on the 1990 computer games released for the PC and Commodore 64, despite it being against the rules on the actual show.
- Secret 'X' was one of four "new" pricing games seen on the seventh taping session of Season 36, which was seen on November 27, 2007 (#4102K, aired out of order on November 5), December 3, 2007 (#4111K, aired out of order on November 12), December 14, 2007 (#4125K, aired out of order on November 2), January 9, 2008 (#4133K, aired out of order on January 7), January 17, 2008 (#4144K, aired out of order on January 14), and January 22, 2008 (#4152K, aired out of order on January 29).
Premiere Playing (September 14, 1977, #2473D)Edit
First Secret 'X' Win (September 21, 1977, #2483D)Edit
First Playing with the Question Marks (October 26, 1977, #2533D)Edit
First Playing with the Yellow Squares (February 12, 1981, #3994D)Edit
Secret 'X' for a Vaporvette Sport Boat (November 28, 1985, #N 0124)Edit
Debut of Secret X's Current Color Scheme (October 10, 1986, #6215D)Edit
Secret 'X' for a Mercury Topaz (April 9, 1993, #8775D)Edit
Secret 'X' for a Dynasty JetSport Ski Boat (December 9, 1994, #0060N)Edit
Secret 'X' for a $10,600 Plymouth Neon (March 28, 1996, #9914D)Edit
Technical Win in Secret 'X' (December 4, 1998, #0925K)Edit
A Car Win on Christmas Eve (December 24, 2004, #3105K)Edit
Last Secret 'X' Car Playing with Bob Barker (May 10, 2007, #3984K)Edit
Final Playing with Bob Barker (May 30, 2007, #4013K)Edit
First Secret 'X' Wipeout With Drew Carey (December 14, 2007, #4125K, aired out of order on November 2 as the first playing with Drew)Edit
Secret 'X' for a Trip to the Arizona Cowboy College (April 3, 2009, #4695K)Edit
Timothy's Big Secret 'X' Mistake (March 5, 2010, #5065K)Edit
Secret 'X' for a $21,615 Trip to Las Vegas (December 6, 2011, #5742K)Edit
Secret 'X' for a Scion xB (June 12, 2012, #6012K)Edit
Secret 'X' for a 1951 Chevrolet Bel Air (December 5, 2012, #6123K)Edit
Secret 'X' for a Nissan Juke (April 18, 2013, #6314K, aired out of order on May 3)Edit
Secret 'X' for a $33,000 Trip to Cancun (February 14, 2014, #6615K)Edit
Secret 'X' for an $8,680 Pair of Yamaha V-Star 250 Motorcycles (February 6, 2015, #6995K, aired out of order on January 23)Edit
Secret 'X' for a $15,190 Ford Fiesta S Hatchback (April 3, 2015, #7075K)Edit
Gary's Dumb Luck Secret 'X' Win (March 30, 2016, #7473K)Edit
Abhnab's $15,000 Win (October 28, 2016, #7665K)Edit
Hasmik Plays Secret 'X' with Jane Lynch (February 21, 2017, #7822K, aired out of order on February 22)Edit
Secret 'X' for a $28,569 Polaris Slingshot (December 18, 2017, #8131K)Edit
Secret 'X' for a $19,950 Mitsubishi Lancer ES (January 19, 2018, #8175K, aired out of order on February 9)Edit
11-Year Old Contestant Plays Secret 'X' (March 21, 2018, #8263K)Edit
Jennifer's Dumb Luck Secret 'X' Win (January 4, 2019, #8565K)Edit
Secret 'X' for a $6,063 Ultimate Sleepover Package (March 19, 2019, #8672K, aired out of order on April 23, originally rescheduled to air on March 12)Edit
Mother's Day Secret 'X' (May 17, 2019, #8755K, aired out of order on May 10)Edit
Secret 'X' for an $8,087 Ultimate Outdoor Workplace (June 4, 2019, #8782K)Edit
Big Money Secret 'X' (October 15, 2019, #8852K, aired out of order on October 18)Edit
Veterans Secret 'X' (November 11, 2019, #8891K)Edit
Secret 'X' With Tiffany Coyne and Jonathan Mangum from Let's Make a Deal (November 19, 2019, #8902K, aired out of order on March 24, 2020)Edit
Secret 'X' for a $24,330 European River Cruise (December 23, 2019, #8951K)Edit
Secret 'X' with Fall Out Boy (January 21, 2020, #8992K)Edit
Secret 'X' for a $17,851 Trip to Whistler (February 26, 2020, #9043K)Edit
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