These included, among others, changing from a weekly format to a daily format, which resulted in the reduction of the top prize from $2,000,000 to $200,000 in 2004; interactive features inviting home viewers to play along with "Double Deal Friday"; and additional special features added to the game (such as "Double or Nothing" and "Super Case").

The round is played in a sudden death style — if either player buzzes in and gives an incorrect answer or hesitates for too long, then their opponent wins and moves on to the main game.

As each briefcase is selected, the player holding it is asked to guess which of the remaining amounts is hidden in their case.

The revised format from 2002 was an instant hit and was extended from six to eight shows, which lead to the executives of Endemol offering the format at MipTV 2003, an important annual television trade fair taking places in Cannes, France,[11] where the Dutch host Linda de Mol presented a promotion version of the show.

[12] The Australian network Seven purchased the format, and the first episode was aired on 13 July 2003,[13] making it the first international adaptation of the Dutch show.

Curiously, the show debuted on the same day when the Argentinian version Trato Hecho hosted by Julian Weich was launched.

On 2 February 2004, the show was relaunched as a half-hour format and moved to weeknights at 5:30 pm,[16] directly competing against Nine's The Price Is Right.

In the summer of 2004, several hour-long primetime specials were aired in addition to the regular 5:30 pm episodes.

These special editions included "Biggest Winners – Dream Team",[19] "Conflict of the Couples",[20] "Unluckiest Players"[21] and "Test of the Psychics".

The Super Case, Chance and Mega-Guess features were introduced during 2004's $12 Million Month, and have become recurring segments since.

The last new episodes were produced for Seven in September 2013, the same month that Million Dollar Minute debuted at a 5:30 pm time-slot.

[9] On 9 July 2024, it was confirmed that 10 would broadcast six hour-long primetime celebrity specials of the game show, in addition to the regular 6:00 pm episodes.

These specials will show on Monday nights beginning on 22 July 2024, featuring celebrities including: comedian Tom Gleeson, MasterChef Australia judges Andy Allen and Sofia Levin, Gogglebox Australia stars, Collingwood Football Club premiership captain Darcy Moore, Matildas champ Kyah Simon and the winner of the tenth season of I'm A Celebrity…Get Me Out of Here!, Skye Wheatley.

The celebrities will receive a chance to win a $250,000 prize for their charity that will be chosen and the specials will have 26 briefcases, and the board is set to the 2006-2013 format with the $35,000 and $250,000 added.

These specials are reportedly an answer to the premiere of Millionaire Hot Seat - airing in the same timeslot.

[31] Should a podium player guess that there is $200,000 in their case, they must decide whether it is the regular $200,000 one or the Double Shot version to prevent them having an extra chance of winning the bonus money.

In the 10 Double Shot episodes that aired the total prize money won by contestants was $235,100.

The Fantastic Four was a series of specials that first aired 21–26 September 2009 and then randomly throughout the year, where the briefcases included extra $50,000, $75,000 and $100,000 replacing the 50c, $750 and $1,000.

A number of these are endgame features which occur after the player takes a deal, but others have other requirements for activation.

The Chance is an endgame feature introduced in 2004 where the player is given an opportunity to rescind their deal and take the amount that is in their case.

If the player takes the Chance, they win whichever amount is inside their briefcase, otherwise they keep their $6,500 deal.

The Mega–Guess is a feature introduced during the $12 Million Month in 2004 that increases the value of the bonus money given to the next podium player if they correctly guess the contents of their case.

A $25,000 Mega-Guess was offered to the player holding the 25,000th case to be opened in the show's history, however it wasn't won.

The two cases format was introduced on 23 June 2006, and by 2007 the player could no longer choose how much to gamble, and must wager their entire deal.

Risk It All is an endgame feature introduced in 2010, which is offered to a player who has taken a deal under $10,000, but has two smaller amounts left in play.

If the player takes this special deal then the game ends immediately and no further cases are eliminated.

The Second Chance is an endgame feature introduced in 2013 where the player is given an opportunity to switch the deal with one of the previous offers made earlier in the game, selected at random.

When it is activated, a "Dealette" model will give a button to the contestant, which is pressed to confirm their decision to take the switched deal.

The gameplay shown has some minor changes compared to the actual game show airing at the time: Kim wasn't given the opportunity to make a guess for the contents of her case before opening it, and Sharon claims that she became the main contestant by having the "fastest fingers" (the preliminary quiz was dropped from the 2007 season, and the fictional game shown was of that version).

The video game, available only for Nintendo DS, was developed by Gravity-i and published by Mindscape and features Andrew O'Keefe on the cover.