1. Write the episode yourself

The parts of Jack that are mechanics rather than jokes are all question types in the quizshow.io editor. Buzzer questions let only the fastest player answer and take points away when they are wrong, which is the whole reason the show was tense — the screenshot at the top of this page has a player on minus points. Pairs is the Jack Attack: match the word on the left to the one on the right before the clock runs out. One-of-Three is the DisOrDat: a run of questions with the same three answers, as fast as you can take them.
On a paid plan a text-to-speech moderator — or your own recordings — reads the questions out, so the round has a host instead of a screen of text.
It runs in the browser: one shared screen, everybody else on the phone they already have, no app and no accounts for the players. Why is this first in the list? It's great — and I built it.

Play a buzzer question right now →

Or write your own round free →

The catch: the jokes are yours to write. Nobody hands you Cookie Masterson.

2. You Don't Know Jack: Full Stream

The actual game, still sold. It lives in The Jackbox Party Pack 5, hosted by Cookie Masterson and framed as a night of television on a fictional and almost certainly evil streaming service called Binjpipe. One person owns the pack and puts it on a screen; up to eight players join from their phones with a room code, and an audience of thousands can play along. It is on Steam, PlayStation, Xbox and Switch, and on Amazon Luna with nothing to download at all.
The catch: the questions are a fixed set. A group that plays it often will start recognising episodes, and there is no way to add your own.

3. The 1990s volumes on Steam

Most of the classic catalogue was reissued in 2013 and a good deal of it is still listed — YOU DON'T KNOW JACK Vol. 1 XL is under three euros. This is the original writing, unaltered, including the parts that have not aged well.
The catch: these are one-machine games. Everybody crowds around a single keyboard with a key each, which works for three friends on a sofa and not at all for a party. The 2011 reboot, which was the last one built for consoles, is gone from the stores entirely — second-hand discs only.

4. Trivia Murder Party

The same studio's own successor, and the closest thing in the catalogue to Jack's cruelty. Trivia Murder Party asks real trivia questions and then makes a wrong answer genuinely expensive: you go to the Killing Floor and play a minigame for your life. It is in Party Pack 3, the sequel is in Party Pack 6, and a third instalment is sold on its own.
The catch: the horror cartoon theming is the point, so it is a louder, sillier evening than Jack was, and the minigames take up more of it than the questions do.

5. Fibbage

Fibbage takes the one thing Jack could not do — let the players be funny — and builds the whole game on it. A real and very obscure question appears, everybody writes a plausible lie, and you score for fooling other people and for spotting the truth. There is a version in most of the party packs.
The catch: it rewards invention rather than knowledge, so it scratches a different itch. If that is the itch, the games like Quiplash list covers it properly, and No Offense is the free one.

6. Last Brain Standing

The free browser option. Last Brain Standing needs no download and no account: somebody makes a room, everybody joins with a code, and it runs on a TV with phones as controllers. Everyone has three lives, a trivia question goes out, and then the group votes on who gave the worst answer. Knocked-out players stay in the room and keep voting. Four players minimum, 15 to 25 minutes.
The catch: the vote decides, not the answer key, so a confident wrong answer that makes everybody laugh survives a round that a boring correct one does not. That is a good party game. It is not really a quiz.

7. Kahoot!

Kahoot! is the big-screen-and-phones format at its simplest, free for small groups, with a public library of ready-made quizzes on more or less any subject and an editor for your own.
The catch: it is sincere by design. Faster is worth more, a wrong answer simply scores nothing, and there is no host and no script. You get the quiz without the comedy, which is precisely the half of Jack most people miss.