- Designated Villain: The Banker got hit with this hard in the American versions with Howie relaying his "advice" and the contestants often being taunted into taking deals.
- Dork Age: While Deal or No Deal did revive the American game show genre somewhat and built on the boost Who Wants To Be A Millionaire? gave it, it also convinced the major networks to go full throttle with all the elements that propelled the genre into its most severe Dark Age since the Quiz Show scandals of the 1950s, which was still in effect for DOND's 10th anniversary in 2015 (only the holdovers from the 80's and 90's plus the Let's Make a Deal revival have escaped this, although The Chase did OK). NBC/Comcast/Universal rivals Disney/ABC eventually dealt with the matter by reviving straight classic versions of Pyramid and Match Game for a Sunday night block, and DOND was revived in 2018 on CNBC, but it remains to be seen how it will affect things.
- Franchise Original Sin: DOND's tactics with how its production went was just the first of a boatload of padded game shows to come.
- Game-Breaker: The Nintendo DS version has no randomization for the first round.
- Heartwarming Moments:
- Any time a genuinely nice contestant goes home with as much as he needed (or more).
- Any time the Banker decides to be nice for once.
- On the British version, any time the contestants encourage their new friends.
- Just Here for Godzilla: Invoked in the Spot-The-Future-Royal marathon, fully embracing its status as "the show where Meghan Markle wore a glittery dress and held a briefcase before becoming a princess" (accuracy aside).
- Memetic Mutation: Describing yourself in the situation of this contestant alongside Meghan Markle.
- Never Live It Down: Game show fans remember Deal or No Deal best for starting a Dork Age among the game show genre. Any new game show note will make use of the typical Viewers Are Goldfish/Viewers Are Morons, excessive amounts of Padding, Commercial Break Cliffhangers, and other tropes that the online community really doesn't like.
- Padding: The NBC run might as well have been "Padding: The Game Show". Seriously, did it really have to take 44 minutes to pick out twelve cases? The syndicated run improved in this department with a more fast-paced game.
- A YouTube user chopped out the filler in the January 3, 2007 show, and got an episode just that was just two minutes, forty-six seconds long. And that was for an episode with two contestants (some countries only have one at a time). It took 1:40 for the first contestant's game to be over, and just 1:05 for the other, though that player didn't finish their game.
- The show seems to actually speed up the game and avoid the trope when the contestant has knocked out all the big money amounts off the board. Once the contestant isn't going to win a big amount of money, the game suddenly starts to pick up the pace to get rid of the contestant.
- The 200th episode completely averted the trope by playing "Speed Deal or No Deal": having the players pick the cases they wanted in that round all at once, then having them all opened in rapid succession and knocking all the money amounts found at the same time instead of one by one. No phone calls by the Banker were ever made, opting to show the offer right away and giving the contestant 20 seconds to make a decision. The whole purpose behind this was, rather than an acknowledgement and reversal of the show's padding practices, a stunt if at least $1,000,000 was won that night, the Banker would dive into a cake made to celebrate the 200th episode; if not, Howie would jump into the cake instead. The goal wasn't reached, and Howie jumped in.
- Proof if proof were needed that game had a lot padding is that, on the US version, recordings of a single player's game could take upwards of eight hours. For one contestant. For a one-hour show (without commercials).
- Retroactive Recognition: The most famous game show model in history.
- Surprisingly Improved Sequel: Removing the family members, whose basic purpose on the NBC version was just to shout, "You're a risk taker! No Deal!" and give bad advice, made the game run a lot more smoothly.
- They Changed It, Now It Sucks!: Oh, boy.
- The syndicated run took a great element of the British one (prospective contestants holding the 22 cases) and took away the one thing about it that makes the Brit take on the format great. On the British version, those holding the boxes stay on the show until they're chosen by the producers which may be days, weeks or even months and in the meantime the group becomes like a family (as can be seen in virtually any episode); in the syndicated version, however, each week was self-contained...until the very end, at which point they taped four weeks with the same group which then aired Out of Order.
- The Dutch original's 2011 series. They dropped the "block versus block" part of the quiz, and instead the top player from each block comes down and plays against another player in a survey question, with the closest answer going through. The third round works a bit like the British game show Number 1, and it works fine, but the greatest atrocity committed comes in the briefcase game. They've dropped having the players from the winning block open the briefcases and make predictions for cash, and now the models themselves have been given the task. A major sting in the tail comes when you realize that almost all the temptations, a major part of the original game, have been removed.
- What an Idiot!: Both those who deal with a safety net still in place, and those who keep going despite the odds, can fall into this category. Indeed, this contestant on the British version is the best example of just what can happen if you deal too early.
- Choking from the pressure cost two people in the US version the top prize when they caved to the Banker's offer. It would've been alright... had both times not been for twice and then thrice the normal $1,000,000. In fact, you could tell when a playthrough was screwed if the Banker put up a six-figure offer and the words "college fund" were spoken by a family-supporting contestant. Heartwarming that they look out for their family, but almost always a tell that they are not going to stay in the game.
YMMV / Deal or No Deal