In 1999, things were looking bleak for the American TV GameShow genre. There were no prime-time network game shows, and the only shows around were holdovers from the 1970s and 1980s ''Series/ThePriceIsRight'', Whoopi Goldberg's ''HollywoodSquares'' revival, the latest (and lamest) ''Series/MatchGame'' revival, and evergreens ''Series/WheelOfFortune'' and ''Series/{{Jeopardy}}''.

Then ABC decided to try out an American version of a British show called ''WhoWantsToBeAMillionaire'', and quicker than you could say "A Creator/MarkGoodson/Bill Todman Production", a new era in the old format was born.

Of course, when a show is successful, everybody else wants to FollowTheLeader. Many games, specifically in primetime, shamelessly borrowed many of the elements that made ''Millionaire'' so unique and successful.
!!Shows that attempt to mirror ''Millionaire'' commonly have the following features:
* A large top prize, usually $1,000,000.
* A single contestant or team competing against "the house", as opposed to multiple contestants competing against each other.
* A "money ladder" or "money tree", in which each right answer moves you up to a higher amount.
* Multiple-choice questions that tend to get more obscure and trivial as you progress, practically making the advertised jackpot UnwinnableByDesign unless you happened to be an expert on the final question.
* [[AllOrNothing Losing all of your money if you answer wrong]], unless certain levels of the money ladder are "safe havens" where you're guaranteed to win at least that amount.
* {{Lifelines}}.
* Gratuitous {{Padding}}, such as pauses before the reveal of the answers (sometimes [[CommercialBreakCliffhanger spilling over into commercial breaks]]).
* Dark theater-in-the-round sets adorned with complex lighting setups.
* Foreboding music, oftentimes involving a HeartbeatSoundtrack.
* [[TrailersAlwaysSpoil Giving away the outcomes of upcoming games]], in the hope that it'll entice people to watch.

'''Don't add examples to this page unless they ''clearly'' were influenced by ''WWTBAM''.''' The mere presence of {{Lifelines}} or a $1,000,000+ prize does not automatically mean it's a ''Millionaire'' clone. Premiering after ''Millionaire'' doesn't instantly make it comparable to the show. We're looking for shows that tried to emulate the whole package game format, presentation, etc.
!!Shows that tried to follow in Regis Philbin's footsteps:
* ''Series/OneVersusAHundred'': From the creators of ''Deal'', a multiple-choice quiz against a "mob" of 100 contestants for a $1,000,000 prize. In the NBC version, the resemblance was only made stronger in season 2 with the addition of a money ladder, plus its original question writing style was thrown right out the window in favor of the same style of writing from ''Millionaire''.
* ''Series/AreYouSmarterThanAFifthGrader'': A million-dollar quiz where a single player answers up to 11 questions from grade school textbooks, using {{Lifelines}} known as "Cheats" to gain answers from an appropriately aged classmate.
* ''Series/DealOrNoDeal'': While subverting many of the Millionaire clones by being a unique (well, at the time) game based more on luck and intuition instead of knowledge, it still managed to hit all of the non-quiz features (i.e. single player, big money, padding, dark and glitzy set, the soundtrack, etc.). ''Deal'' ended up being so popular that it, and a Writers Guild of America strike, triggered a second renaissance of primetime game shows, many of which ended up meeting this trope.
* ''Series/DontForgetTheLyrics'': A carbon copy of ''Fifth Grader'', using song lyrics as opposed to academia.
* ''Series/{{Duel}}'': ''Millionaire'' meets ''World Series Of Poker''. Players compete for a growing jackpot by defeating opponents in a multiple-choice quiz. The second season enhanced the comparison even further by awarding the jackpot to winners of five consecutive matches. Defeated champs who had won at least three matches had their winnings cut in half; otherwise, it was AllOrNothing.
* ''Series/{{Downfall}}'': Million-Dollar ''[[Series/TheJokersWild Joker's Wild '90]]'' with a money ladder and the added risk of throwing additional prizes off the side of a building.
* ''Series/{{Greed}}'': One of the first (and most blatant) imitations, with a team-based format and increasingly complex multi-answer questions. FOX ads gleefully bragged that contestants could win ''two'' million dollars on its show. The main original additions were "The Terminator", which momentarily had two players against each other instead of the house, and a system for the last four questions out of eight where teams had to select the correct four answers out of a selection of six, then seven, then eight, then ''nine'', which is as difficult as it sounds.
* ''It's Your Chance of a Lifetime'': The only differences between this show and its forefather were: an opening question to pay off a credit card bill, only nine questions in your stack instead of 15, and wagering on each question to determine its value. Aside from that, probably the closest imitator of the bunch.
* ''Series/{{Jeopardy}}'' averts this trope. Although the Trebek version uses complex lighting and it is possible to lose a lot of money, the show debuted long before ''Millionaire''. Aside from those occasions when someone manages to be returning champion for 74 games straight, the show only really gives out prizes approaching $1,000,000 or more during special tournaments (such as the ''Million Dollar Masters'' and the '' Ultimate Tournament of Champions'', itself held in the wake of Ken Jennings' success). Also, ''Jeopardy'' has far less {{Padding}}, usually cramming all 61 questions into a half-hour slot.
* ''Series/MillionDollarMindGame'': An American version of the Russian PanelGame ''WhatWhenWhere'', six contestants work as a team to answer increasingly complex questions with each player taking a turn as team captain. The main difference from other shows on here is that visual aids are used for many of the questions, up to three incorrect answers are allowed and the contestants vote on whether they want to keep playing the game or walk away after each question. It's worth noting that the original Russian game have neither lifelines nor money tree. It has a lot of padding though.
* ''Series/MillionDollarMoneyDrop'': Inverts the trope by giving the team the million dollars right at the start, but forcing them to keep it by placing the money on answers to multiple-choice questions, and losing money placed on wrong answers.
* ''Series/MinuteToWinIt'': ''Millionaire'' money ladder meets ''Series/BeatTheClock''-type stunt show, with bonus heavily caffeinated Guy Fieri. Early episodes played it straight, but later episodes loosened up the feel of the show, and even added lifelines.
* ''Series/{{Paranoia}}'': A single studio contestant tries to win money while three other contestants playing via satellite and scores of online players tried to siphon the money away.
* ''[[Series/{{Password}} Million-Dollar Password]]'': Tried to slap a money ladder onto the classic ''Password'' game while overhauling the front end to be rapid-fire. Was hosted by original ''Millionaire'' host Regis Philbin.
* ''Power Of 10'': Players answered survey questions to win up to ''ten'' million dollars.
* At the time, CBS also began to air ''Series/ThePriceIsRight Million Dollar Spectacular'' specials, primetime episodes with a bonus prize of $1 million (initially by hitting the dollar on a Showcase Showdown bonus spin, but later by fulfilling a certain condition in a specified game). However, they subverted being ''Millionaire'' clones by maintaining ''Price'''s status quo, format and style-wise; pretty much the only major differences were that the set was glitzed up a bit, and the prize budget was noticeably higher.
* ''Show Me The Money''; a show for ABC from the creators of ''Deal or No Deal'' and hosted by ''Creator/WilliamShatner'' of all people, which had contestants answer open-ended questions to potentially win just over $1,000,000 (up to $1,150,000 to be exact, although the odds of this were 1 in 924, and that's assuming '''no mistakes''' are made). Instead of lifelines, the contestant was given common themes with three possible questions, and could switch to another question but was not allowed to return to a previous one. 12 cash amounts and one "[[OneHitPointWonder killer card]]" were hidden in scrolls randomly distributed among 13 "dancers". The contestant won money on correct answers but lost money on wrong answers, possibly resulting in a negative score. If the killer card was picked, the contestant had to answer a single question correctly to continue, otherwise the game was over and the contestant left with nothing. It was also possible for the game to end immediately if it was [[NonStandardGameOver impossible for the contestant to finish with a positive score.]]
* ''Series/TwentyOne'': The 2000 revival of the rigged quiz had a cumulative money ladder that ultimately awarded a million dollars for a player's seventh consecutive win, and a {{Lifeline|s}} in the form of a family member being brought on stage to help on one question. All of the questions were multiple choice (although for the most difficult questions, players would have to pick ''two'' correct answers out of five choices).
* ''Series/TheWeakestLink'': The American version had the usual "money ladder" format with only minor changes from the original version of the show.
* ''Series/WheelOfFortune'' has been showing signs of this:
** At least a few international versions (including France, New Zealand, and Poland) used complex lighting setups in their 2000s revivals, whereas their original versions did not. These versions also used heartbeat soundtracks.
*** Australia's 2008 revival not only saw a set and soundtrack change, but a $1,000,000 top prize was added.
** After the Million-Dollar Wedge was introduced in the United States for Season 26, plenty of trailers would suggest somebody could win the top prize.
* ''Series/WinningLines'': Originally produced by the same people behind ''Millionaire'', its U.S. version for CBS was adjusted to compete ''against'' it. The relatively minor changes included the addition of a $1,000,000 top prize to its BonusRound, along with additional {{Lifelines}} and a way to lose.
* ''[[Series/WhosStillStanding Who's Still Standing?]]'': In the U.S. version of the Israeli show, there's one main challenger who challenges a circle of other contestants in duels over trivia. Most of the hallmarks are there; even better, the show managed to stay up to date and rips off the new "shuffle" format the syndicated version of ''Millionaire'' had started using; each contestant is worth between $1,000 and $20,000, and the final three contestants are worth $250,000, $500,000, and $1,000,000. Eventually got destroyed by ''Series/TheVoice'' and cancelled.