Who Wants to Be the First?

Who Wants to Be the First? (Vietnamese: Ai là Đệ Nhất) is a custom-made game show based on an international television game show Who Wants to Be a Millionaire? (shortened as WWTBAM) distributed by Sofia the First Channel. It was hosted by nam7ccaothang, listed by his real name Đặng Hoàng Nam. With only one contestant plays at a time, the contestant have to tackle series of multiple-choice questions to win prizes. The show was originally named Who is the First, starting on its second season, it was renamed to Who Wants to Be the First?

The show was premiered on July 19, 2020 on Sofia the First Channel. Starting from September 15, 2020, the show was re-aired on Sofia the First Channel 3, which is a channel that specialized in airing custom-WWTBAM series. The main currency for the show was originally StF, which stands for Sofia the First; this currency was used for the first five seasons. Starting on the show's sixth season, the main currency was changed to ĐS, which stands for Đong Sofia the First due to a dispatch was issued by the host of the show himself on May 3, 2021.

Core rules
Contestant have to answer a total of 15 general knowledge multiple-choice questions that increases in difficulty with 3 milestones which located in questions 5, 10 and 15. If they answer correctly, they can move on to the next question. If the contestant answer the question wrong, the prize will go back to the last milestone. If no milestone is reached, the contestant don't win anything. The contestant feel unsure about an answer and does not wish to play on, they can walk away with the prize they have won to which the host will ask them to confirm this as their final decision; in such cases, the host will usually ask them to state what answer they would have gone for, and reveal if it would have been correct or incorrect.

Season 2 changes
Season 2 saw a few changes on its money structure, as well as the gameplay was slightly shorter than the previous season. Contestant now have to answer a total of 12 questions instead of usual 15, and the 3 milestones are located in questions 2, 7 and 12.

Lifelines
During the game, the contestant is given a set of lifelines that they may use only once to help them with a question. During the first season, an extra rule for these lifelines is applied. In the first milestone (questions 1-5), all 3 lifelines are free to use, depending on the contestant's usage. On the second milestone (questions 6-10), the contestant can only use 1 of the 3 lifelines. After the player reaches the 3rd milestone (questions 11-15), all 3 lifelines are free to use again. But on the second season onwards, this rule was removed permanently due to the whole game was easier than the original show. When the show uses the Clock Format, usage of lifelines would temporarily stop the clock.

Money Tree
The money structure varied from each season, and sometimes there are two or more structures every season. During the first season, the money tree was displayed with the points value, under the currency of "1 point is equivalent to 1,000 StF". Starting on the second season, the points value was removed and replaced with the monetary value. Also starting on the sixth season, the currency was changed from StF to ĐS. The table below uses the points value, under the currency of "1 point is equivalent to 1,000 StF" in the first five seasons, and "1 point is equivalent to 0.1 ĐS" starting on the sixth season.

The Host Battle
The Host Battle was the first special edition of the show, to give hosts of other custom versions of Millionaire the opportunity to experience of being a contestant of the show. This special edition have invited 3 contestants:
 * Nguyễn Tuấn Dũng: Host of Ai là Triệu Phú - TV House
 * Nguyễn Việt Anh: Host of Ai là Triệu Phú - VATV (later known as Who Wants to Be the Miraculous?)
 * Nguyễn Việt Thái: Host of Ai là Cụt Phú

Although the rules of that special number did not change, it was the first episode of the show to introduce the "Charity Question" minigame.

Sofia the First Tournament
Sofia the First Tournament was a special edition that firstly introduced in the fourth episode of Season 2, it is based on the U.S. version of Super Millionaire and was made for contestants who want to have opportunity to win more money. This special edition had several differences from the original format, specifically:
 * The Clock Format is introduced where contestants have to answer the first 11 questions in the specific time limit.
 * The 3rd milestone, which originally called "THE FIRST" was changed to "SOFIA THE FIRST"
 * The top prize was doubled, while the rest of the values remained the same.

This edition ended on the fourth season, after the top prize was raised to 4 billion StF.

Gamblers Special
The Gamblers Special was the third special edition of the show, only appeared on the sixth episode of Season 3. The rules are a fusion of German Zocker Special and Japanese Super Millionaire. The format is worked as followed:
 * There are still 12 questions, but there is only one milestone which located at Question 12. All 12 questions have no time limit for the contestant to answer.
 * The only milestone which located at Question 12 was named SUPER FIRST and the top prize money was increased to 4,000,000,000 STF (or 4 billion STF).
 * Since there is only one milestone in Question 12, contestants will become empty-handed if they answer any question incorrectly. But, they can choose to walk away on the first 10 questions, but they can't on the last 2 questions.
 * The first 7 questions consisted of 4 options, but the last 5 questions are consisted of 2 options. This resulting the chance of getting the correct answer on the last 5 questions were 50%.
 * There are 4 lifelines, in which 1 of them (Switch the Question) were given after the contestant answered the 7th question correctly. But if the contestant used 1 of 3 lifelines before Question 6, the remaining lifelines cannot be used until the contestant answered the 6th question correctly.

Although the format looks extremely difficult, but since 2 out of 3 contestants correctly answered the 12th question and won the top prize, the format was no longer used starting from the fourth season.

Christmas Special
Christmas Special was a special edition on the occasion of Christmas Day, which falls on December 25 every year. While the rules and values are unchanged, a new minigame was introduced, which was called "Special Question".

New Year Special
Similar to the Christmas Special, the New Year Special was a special edition on the occasion of New Year's Day, which falls on January 1 every year. In this special edition, the core rules and values did not change.

5th Anniversary
The 5th Anniversary Special was a special edition of the show, to celebrate the show's fifth anniversary. The format during this special edition was similar to the Sofia the First Tournament, but with a few changes, including:
 * There is a presence of Fastest Finger First
 * Contestant can choose one of two game modes provided:
 * Classic mode: there are 3 milestones which located at questions 2, 7 and 12; contestants can only have 3 lifelines throughout the game and no additional lifelines given after 2nd question.
 * Risk mode: Contestants can exchange the 2nd milestone (7th question) to 2 additional lifelines (Double Dip and Ask One of the Audience). In overall, the contestant can only use 4 out of the 5 lifelines given during the game.