GameShow which originated in the Netherlands and has been exported to over 30 countries, with the US version originally airing on Creator/{{NBC}}. In the game, one player (the One) plays against 100 other people (the Mob). The players are asked a series of questions; if the One correctly guesses, he moves on to the next question, while all Mob members who answered incorrectly are knocked out. The goal of the One is to answer as many questions as it takes to knock out all of the Mob. If the One answers a question incorrectly, the game ends and (in some versions) the prize money is distributed amongst any remaining Mob members.

In 2009, Microsoft revived the show in a unique way as an [[{{Xbox360}} Xbox Live]] game through a twice-weekly primetime event for all Gold members. The One and Mob remained unchanged, while the game allowed the crowd (anyone playing the game who was neither the One or a member of the Mob) to also answer questions; the top three scorers of the round got a free Xbox Live Arcade game (no small feat, as there could be up to several ''thousand'' crowd members at any time). Selection for being the One or a Mob member depended on score, and the game was played for Microsoft Points using the last NBC format.

Microsoft also hosted daily ''Extended Play'' games with no prizes, though scores achieved here counted toward a person's chances of being selected during ''Live'' and it was much easier to unlock Achievements. Season 2 of the Xbox run ended on February 12, 2010, but in July it was reported that [[ the show had been canned again.]]

Reruns began airing on {{GSN}}, which became very popular especially when combined with the then-ongoing Xbox Live version. The show was {{Uncanceled}} again on November 15, 2010 with [[DancingWithTheStars Carrie Ann Inaba]] as emcee. The GSN version was a cheaper production, with no physical setup for the Mob and a much smaller top prize of $50,000 (sometimes $100,000); the show ended again after just eight weeks.
!!GameShowTropes in use:
* BonusRound: The 3x Bonus Question in ''Extended Play'', which wrapped-up each session.
* BonusSpace: The 2x Bonus Questions in ''Extended Play''. Powerchips in the iOS version.
* {{Lifelines}}: "Trust the Mob", present in all American versions, where the most popular answer among the Mob is automatically locked in.
** The NBC run had two other helps "Poll the Mob" [[note]](the player picked an answer and saw how many Mob members chose it)[[/note]] and "Ask the Mob" [[note]](the player heard the reasoning of two Mob members, one who is correct and one who is wrong {thus eliminating one wrong answer in the process})[[/note]].
** The Xbox run used "Trust the Crowd" [[note]](all players in the game)[[/note]] and "Trust the Top 10" [[note]](the 10 highest scorers on the leaderboard)[[/note]].
** The GSN version removed "Ask the Mob".
** Most versions before the American version gave the contestant a number of "Dodges" [[note]](the player doesn't have to answer, but loses a percentage of their bank and gets no money for eliminated members of the 100)[[/note]] and a "Double" [[note]](the player gets double for each member of the 100 eliminated)[[/note]].
** The British version had a Double and three Dodges, granted after the first question. The former doubled the prize money for that question, whereas the latter skipped the question at the cost of half the accumulated money, and no reward for that question. A fourth Dodge could be optionally acquired after 75 of the 100 were eliminated, but the question for it could not itself be dodged.
** The Korean version calls these "chances": "One person's answer" [[note]](the One can ask a Mob member for their answer and why)[[/note]], "Two persons' answers" [[note]](works the same way as "Ask the Mob")[[/note]], and "100 people's answer" [[note]](basically [[WhoWantsToBeAMillionaire Ask the Audience]], but with the Mob)[[/note]].
** In Season 1 the NBC run, after The One is down to 25 or fewer mob members, a sneak peek at the next question would be given before The One decides whether to take the money or the Mob.
* Personnel:
** GameShowHost: Bob Saget on NBC. The Xbox version had Chris Cashman live but Jen Taylor (pre-recorded) actually on-set; Jen, again in pre-recorded form, also hosted ''Extended Play''. Carrie Ann Inaba hosted the GSN run, but announced via Twitter that she wouldn't be returning if the show was renewed...which it wasn't.
** StudioAudience: No, it wasn't just the Mob.
* WhoWantsToBeWhoWantsToBeAMillionaire: And how.
!!This show provides examples of:
* BaitAndSwitch: Whereas ''[[WhoWantsToBeAMillionaire Millionaire]]'' has mostly straightforward questions and answers, ''1 vs. 100'' has questions that ask one thing but the answers are asking for something else.
** One video game example: Who starred in the 1939 film ''Film/TheWizardOfOz''? A) Liza Minelli's mom. B) Ashley Judd's mom. C) Jo Anne Worley's mom. [[labelnote:answer]](Liza Minelli's mom, Judy Garland.)[[/labelnote]]
** One of the more heartbreaking examples starts off innocuously enough with [[ "What is the Capital of the United States?"]]...before the answers bump the question to NintendoHard.
** Another one from the NBC run: Who was the first President of the United States? A) The one born in Maryland, B) The one born in Pennsylvania, or C) The one born in Virginia?
* CatchPhrase: "Do you want the money, or do you want the Mob?"
* ChristmasEpisode: One episode featured a mob representing the gifts in the song "The 12 Days of Christmas", Santa Claus, and a small group of elves.
* CommercialBreakCliffhanger: Occasionally done.
* FromACertainPointOfView: Since the Xbox era came between the NBC and GSN runs, it (or at least ''Live'') could reasonably be considered Seasons 3-4; the GSN version would hence be Season 5.
* FakeDifficulty: Some of the higher tier questions can fall under this. See BaitAndSwitch above.
* GuestHost: Guest co-host, really. Occasionally, ''Live'' brought in celebrities that the Xbox audience was likely to know (such as [[GearsOfWar Cliffy B]], [[Webcomic/PennyArcade Gabe, and Tycho]]) to serve as an additional source of commentary.
* RepeatingAd: ''Extended Play'' featured ad breaks every few questions; the commercials were repeated extremely frequently, especially early on.
* TitleDrop: Before the first question, the host shouted "It's 1 vs. 100!" Each successive question decreased it to "1 vs. ''x''".
* TrailersAlwaysSpoil: NBC promoted the hell out of the only $1,000,000 win, including ''in the episode itself''. This was averted on its Canadian broadcast, where the big event wasn't spoiled beforehand.
* VersusTitle