- Bonus Game is played on a board with four windows, each of which is associated with one small prize and one of which conceals the word "BONUS." While the game uses small prizes, which the contestant can win, the real goal of the game is to win the "bonus prize," which is of much greater value.
- The contestant is shown each of four small prizes, one at a time, each with an incorrect price. He or she must determine whether the actual price is higher or lower than the one shown. A correct decision wins that prize, and a marker on the board is moved to mark the corresponding window. If the contestant is wrong, the small prize is lost and the marker is removed from the board.
- After all four prizes have been played, all four windows are lighted. If the window that lights "BONUS" has been marked, the contestant also wins the bonus prize. If the contestant does not win any of the small prizes, the game ends immediately.
- Contestants who correctly price all four smaller prizes automatically win the bonus prize, since they mark all four windows.
- Bonus Game was one of the first three pricing games to be played on the show having premiered on September 4, 1972 (#0011D), the other two being Any Number and Double Prices. Like Any Number, Bonus Game was won on its first playing.
- For the first three taped episodes, the windows that would read "NO" and "BONUS" were yellow; beginning on September 11, 1972 (#0021D, the sixth aired episode), they became blue, as the yellow made the words too hard to read. Recently, the windows were replaced with a TV monitor, which only shows "BONUS!" when it is time for the bonus to reveal, while the others remain the same.
- On June 17, 1974 (#0941D), the show's staff decided to retire Bonus Game, which was last played on June 13 (#0934D) and created Shell Game to replace it; after the newer game's debut, Bonus Game was not played on the daytime show for over a year, although it continued to appear on the nighttime show. For reasons unknown, it was returned to the active daytime rotation on July 24, 1975 (#1514D) and removed again on July 28 (#1521D), and was permanently back in rotation on September 5 (#1575D), and has remained there ever since.
- On May 28, 1974 (#0912D), this game along with Any Number got their title names on the same day. When the game returned to the daytime rotation on September 5, 1975 (#1575D), the color scheme got an update to better mesh with the show's set. On November 5, 1981 (#4254D, aired out of order on November 19), the game took on its gold color scheme. On March 18, 2013 (#6271K, aired out of order on March 19), the navy blue windows were replaced by a large monitor divided into four gold windows with a tall star. The word "NO" gets dropped out but the word "BONUS!" appeared in animation. In a win, the background is green; in a loss, it is red and without the exclamation point.
- Due to Barker's fur ban, all the times that Bonus Game had been played from the first two weeks of shows have not been rerun since their first broadcast; despite this, an episode in which a fur coat was the bonus prize (November 16, 1972, #0114D) was mistakenly rerun on Game Show Network.
- A contestant named Paul Levine played Bonus Game perfectly not once but twice. He played it perfectly on the day it premiered and got invited back for a special 40th anniversary special on September 5, 2012 (#6023K, aired out of order on September 4) and played it perfectly again, the latter of which for a restored 1972 Chevrolet Monte Carlo worth $16,995.
- On May 17, 2017 (#7943K), like Shell game, if contestant won all the SPs, contestant would have a free chance to win the other prize on top of everything else by trying to find the BONUS. (this prize, Mitsubishi Lancer - $19,405) In this playing, the contestant won all four windows, but picked the third window instead of window #1.
- The game is currently in a winning streak, with the most recent loss happening on January 26, 2016 (#7382K, aired out of order on January 19).
- The most number of times this game was played in any season was 91.
- On the Dennis James version, Bonus Game was played alongside Shell Game during the third season, although Bonus Game had been removed from rotation on the daytime show. Episodes featuring Bonus Game while Dennis James was hosting have not been rerun, although a monochrome promotional picture from some point after the name was added to the board (showing Dennis next to a playing in progress without a contestant visible in the shot) was shown during the A&E Biography TV Game Shows.
- In Australia, during the Ian Turpie era, when a contestant got all four decisions correct, he or she won the bonus prize as well as a chance to win $50 by finding the "bonus" window in one guess. A similar bonus format is used in Shell Game on the American version of Price.
Bonus Game Wipeout from 2006 (October 18, 2006, #3723K)
Bonus Game Wipeout from 2011 (October 31, 2011, #5691K)
Bonus Game from the 40th Anniversary Special (September 5, 2012, #6023K, aired out of order September 4)
Bonus Game's New Look (March 18, 2013, #6271K, aired out of order March 19)
Painful Bonus Game Loss from Season 42 (March 18, 2014, #6662K, aired out of order on June 23, originally rescheduled for June 26)
Painful Bonus Game Loss from Season 43 (November 4, 2014, #6872K)
Bonus Game Wipeout from 2016 (January 26, 2016, #7382K, aired out of order on January 19)