A: In the vast majority of cases, when a duplicate Rule is played, it simply replaces the previous one, yet causes no change. For example, if Draw 2 is in play, and someone plays Draw 2 again, the old one is discarded, the new one replaces it, and game conditions do not change.

You could just put the new one in the discard, leaving the old one in play, but it is important to remember that it is NOT a discard: it counts as one of your Plays, it just doesn’t make any change to the game state.

For this reason, we recommend going through the formality of removing the old copy to the discard pile and playing your new version to the table – at least at first, while you’re still getting used to the concept. Whatever you do, don’t just stack them! Rules which have been superseded should always go in the discard pile so they can be referenced, reshuffled, etc.)

See our Fluxx Card Comparison chart to see which cards we consider analogues, in other words functionally (or practically) redundant. Just click to highlight a whole row, and you can scroll to the right to see all of the cards that do that thing, even if they have different names.

A few non-obvious points would be:

• Different Bonuses don’t replace each other, thus multiple different Bonuses can all be in play at the same time, since each is granted based on a specific condition. For example the Rich and Poor Bonus do not replace each other, and neither contradicts Party Bonus. Furthermore, although we’ve put the Party Bonus and the Love Bonus (and others) on the same line in the comparison chart, we would not consider them to be mutually exclusive, since they grant their Bonuses based on completely different conditions. Of course, if someone played a duplicate Party Bonus it would simply replace the Party Bonus already in play, and nothing would change.

• For Rules which give a Free Action, however, you do not get to execute that Free Action again if you have already taken it for this turn. Note that some cards have analogues which are similar, but not quite identical. For example, some Mystery Play analogues say you can only take the Free Action (taking the top card off the draw pile and immediately playing it) if a certain card is in play.

Unlike the Bonuses, they don’t stack because the conditions allowing the action change. Instead they replace each other, and you don’t get to take that Free Action again. For example, if you already took your mystery play because the Spooky Door was in play, you don’t get to do so again because now the ability is granted because of the Gift being in play.

• Double Agenda and Triple Agenda replace each other as rules. See that FAQ to know how to deal with the Goals associated with them when they change.

• If you replace Let’s Keep Doing That (LKDT) with a new copy of LKDT, you get to discard the old one and it’s associated Action, and pick a new Action from the discard pile to associate with your new copy. Note that the Action you just discarded is now in the discard pile, and possible to simply choose again for the new LKDT if you want to, or there’s nothing else.