Questions tagged [dice]

For questions primarily about dice themselves: polyhedral solids used to generate random numbers. In tabletop RPGs, dice are the most common means of introducing chance into the proceedings. Many players enjoy collecting dice of varying colors and shapes.

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28
votes
6answers
10k views

Why do most people consider a “00” and a “0” on a percentile roll a 100?

Assuming the results of a percentile roll ranges from 1-100, why would the results of a "00" and "0" roll be read as a "100"? In any other context outside of a percentile roll, the "0" on a d10 is ...
31
votes
4answers
8k views

Is there a name for this 20 sided die with two 1s, two 2s, etc?

Purchased this die from a hobby/tabletop store yesterday, mainly because I thought it looked cool, and that it was funny that it was so hard to read the faces: I was passively rolling the die, and ...
167
votes
7answers
12k views

How to let my players fail their rolls intentionally, but covertly?

I'm experimenting with some pen-and-paper role-playing involving characters with hidden agendas. To foster a proper sense of paranoia, I want these hidden agendas to be unknown to not only the other ...
1
vote
0answers
76 views

What is the odds of rolling specific numbers on 4 d20s? [closed]

If I roll 1d20, then 1d20, then 1d20, then 1d20 (effectively 4d20), what are the odds that I'll roll specific numbers? For example, all 20's, or a combination of numbers such as (1, 16, 16, 1)?
13
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7answers
4k views

Most faithful way to convert a d20 base roll to a d6 base roll?

I'm semi-converting an old adventure from DnD 3.X to d6 Fantasy, but I'm having trouble getting a roll conversion that I am happy with. The adventure calls for an extended test of d20 +X rolls until ...
18
votes
9answers
3k views

How can the probability of a fumble decrease linearly with more dice?

I'm working on a simplified RPG system that uses only D6s, and I want a mechanic for fumbles/critical fails. Depending on how good the player character is, they have 1-5 dice to roll and they have to ...
60
votes
4answers
34k views

Is the Saltwater Float represented in this question a good way to test for loaded dice?

Recently a question has popped up in the comments of another question I've recently answered where a player has happened to roll three 18s and other high stats at a table with his dice, which could ...
54
votes
3answers
6k views

Is there any known limit for how many dice RPG players are comfortable adding up?

After reading a few RPG systems that use successes and others that use dice whose shown number are totalled, I came to the conclusion that personally I prefer adding up a maximum of 3–4 numbers and ...
33
votes
24answers
7k views

Simulating these special dice on more regular dice

I've got a game that uses special dice for its resolution. Basically when making an opposed check, each side rolls a bunch of them based on the relevant trait, and whoever rolls most points wins. The ...
93
votes
2answers
45k views

How can I test whether a die is fair?

I have a d20 that seems to be, well, remarkably lucky.* How can I determine whether it's really just luck, or whether the die is in fact unfairly biased? *) Well, I don't, really. This is actually ...
4
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1answer
107 views

Fantasy Grounds - How to repeat a dice roll of 4d6 drop lowest

I'm trying to roll up a new character in Fantasy Grounds and ideally want to roll 4d6 and drop the lowest. So far I can do: /die 4d6 Questions: How do I 'drop ...
4
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1answer
171 views

Has anyone done research on average RPG probabilities?

I've been looking at designing an RPG system lately and I'm currently considering where to set the "difficulty" of a roll at to get some satisfying results. I'm wondering - has anyone researched some ...
21
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7answers
2k views

Do all RPGs have critical failures, and which was the first?

In all the games I remember playing, critical failures have always, in every case triggered an event. This critical failure is due to exceptionally bad rolls on dice, either a 'natural one' in DnD or ...
2
votes
1answer
1k views

Is it possible to exhaust bad rolls from a d20?

A friend of mine thinks it's possible to remove "bad" d20 rolls by exhausting them - continuously rolling the dice during the game, leaving only good rolls. It appears true - he seems to roll an ...
5
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5answers
1k views

I have a player that rolls TOO well. Is this a problem and how can I help it? [closed]

I have been running a home D&D game for the past year now with the party consisting of 5 players; a monk, a paladin, a ranger, a wizard and a druid. The Ranger was the last person to join the game ...
15
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4answers
3k views

How can I examine the distribution of successes-counting mixed dice pools?

After looking at AnyDice's Documentation and Function Library, I remain baffled. I know that AnyDice can do this, but I don't know how to tell it to. Scott Gray's Dice Pool Generator is easier to use ...
20
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6answers
3k views

How do I determine the probability of rolling various ranges of numbers on 4d10, 5d10, etc.?

After realizing that my knowledge of how probabilities function has waned significantly, I'm wondering what the probability of rolling multiple 6's or higher (6-10) on four 10-sided dice, five 10-...
62
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23answers
16k views

How do you play D&D when we don't have dice to play with?

Now I came all the way from Indonesia, and I can tell you that D&D is not a thing. Hence, it will be tough for me (and for my wallet) to find shops that sell d4, d12, d20 and so on. Let these dice ...
9
votes
1answer
211 views

I would like to simulate a die from Anima: Beyond Fantasy in the Rolisteam dice roller on Discord. Can I do that, and if so, how?

As I'm sure anyone who has played it knows, Anima has interesting dice behaviors. Manually keeping track of them is kind of a pain in the neck, so I was wondering if there was a way to implement them ...
2
votes
2answers
87 views

What homebrew dice mechanic can I use for PvP in Amazing Tales?

I've recently started playing Amazing Tales with my children. As a summary of basically all the mechanics of the game (it's pretty simple since it's targeting children), each character has four skills,...
5
votes
1answer
229 views

How would this House Rule for combined Advantage/Disadvantage Impact Rolls?

According to the rules for Advantage/Disadvantage: If circumstances cause a roll to have both advantage and disadvantage, you are considered to have neither of them, and you roll one d20. This ...
10
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3answers
639 views

Is there a way, other than having a Diviner friend, for a player to avoid rolling Initiative at the start of a combat?

I've been starting to theorize the following concept: a player who would... never... roll dice... ever. Not in combat, not elsewhere. No dice. Literally. But I have come across a major obstacle: ...
57
votes
22answers
3k views

What approaches are there to lessen or eliminate reliance upon dice in an RPG? [closed]

Is it necessary to use dice all the time in a dice-based RPG system? In other words, are there occasions or means by which you speed up gameplay by either reducing the number of rolls or removing the ...
75
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3answers
20k views

Does microwaving a die significantly alter its balance?

I saw a rumor online a long time ago that stated by microwaving a die on a specific face it would be more likely to land on said face and have been looking for science by which to either prove or ...
11
votes
1answer
448 views

What brand and style is this D20?

I've had this one die for nearly 30 years, and I just started sorting and displaying my collection so I'm trying to find out which brand/style it is so I can hopefully complete the set someday. I ...
32
votes
14answers
10k views

How many sets of dice do I need for D&D?

I just started playing and am borrowing my friends' dice every time we play. I am looking to buy my own. How many sets do I need to buy?
13
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3answers
4k views

What uses does D&D 5e have for a d100?

After many years I've finally got around to buying a couple of d100s, because I think they're great fun, and percentage die are for wimps ;-) I am also in the middle of a 5e campaign, and I wondered ...
2
votes
1answer
278 views

What is the name of the online dice roller that makes it less likely to roll the same number sequentially?

I'm searching for an online tool a friend used in an RPG once, no more than two years ago. The tool is a dice roller that adjusted the probabilities of an otherwise fair dice roll to make it less ...
7
votes
1answer
152 views

How can I calculate the probability of meeting a certain Difficulty Value on 3d6 with critical success/failure modifiers?

In one Fuzion-system variant 3d6 is used to resolve skill checks. A Task is given a Difficulty Value (DV) from 10 (easy) to impossible (30 and beyond). Characters can have primary attribute levels ...
22
votes
1answer
3k views

What game uses six-sided dice with symbols as well as numbers on the 5 and 6 faces and a blank space where “1” should be?

Note for reviewers, this question is a part of several similar questions. It has been broken down so as to not run afoul of other guidelines. Whilst they are almost identical, they are not duplicates ...
14
votes
1answer
645 views

What game uses dice with compass point arrows, forbidden signs, explosions, arrows and targeting reticles?

Note for reviewers, this question is a part of several similar questions. It has been broken down so as to not run afoul of other guidelines. Whilst they are almost identical, they are not duplicates ...
14
votes
1answer
1k views

What game uses dice with engraved faces, weapon symbols, double weapon symbols and object symbols?

Note for reviewers, this question is a part of several similar questions. It has been broken down so as to not run afoul of other guidelines. Whilst they are almost identical, they are not duplicates ...
8
votes
1answer
477 views

What game uses glitter-filled dice with an arrow-like symbol with bracket-like symbols either side of it?

Note for reviewers, this question is a part of several similar questions. It has been broken down so as to not run afoul of other guidelines. Whilst they are almost identical, they are not duplicates ...
10
votes
1answer
460 views

What game uses dice with cyborg skulls in place of the 1 symbol?

Note for reviewers, this question is a part of several similar questions. It has been broken down so as to not run afoul of other guidelines. Whilst they are almost identical, they are not duplicates ...
22
votes
6answers
6k views

What is the difference between rolling more dice versus fewer dice?

Let's say there are two attacks: one rolls a 10d10 and the other rolls a 5d20. Assuming the modifier was the same, which rolls would have better chances of rolling average, and which would have ...
188
votes
9answers
67k views

How does rolling two dice and taking the higher affect the average outcome?

D&D 5E has an "advantage" concept where instead of rolling 1d20, you roll 2d20 and take the higher. Likewise, disadvantage means rolling 2d20 and taking the lower. How does this affect the ...
20
votes
13answers
5k views

How I can I roll a number of non-digital dice to get a random number between 1 and 150?

This question is not actually related to RPGs but is more of a real-world dice rolling scenario I'm looking for help with, from dice rolling experts. I'm currently memorizing the Book of Psalms, ...
4
votes
1answer
415 views

Are my AnyDice calculations for the Old World Of Darkness correct?

Here is the average amount of successes you can get from a given dicepool (left column) and given difficulty (upper row). Are the forumulas correct? Here is my program on AnyDice.com. Are there any ...
9
votes
2answers
554 views

What can I read about how we tie the stochastic characteristics of task resolution into statements about the nature of a game? [closed]

I like making RPG systems. One thing I've noticed is that different kinds of task resolution systems make the game significantly different. Background For example, games like D&D 3.X and ...
20
votes
4answers
844 views

How do I calculate how many of an item I'll have in this inventory system?

I beta tested a game last week with a pretty fun system. This system is called "Dés d'usure" (in French, because it will be a French game). I translate it into "Wear dice", but I'm unsure. When you ...
6
votes
2answers
535 views

How can I set up a Roll20 macro to roll certain additional dice depending on the results of an initial die roll?

I am playing a wonderful homebrew campaign running D&D 5E via Roll20 (I have a Basic account), and I have just rerolled as a wizard. One of my spells, prismatic spray, requires that I roll 1d8 for ...
10
votes
1answer
453 views

Is this d15 verifiably fair?

Following off of a question asking for how to make a d150 in which this d15 was mentioned in an answer, I was wondering if the linked d15 is fair (gives an equal distribution of results over its range)...
6
votes
2answers
394 views

What is the average point buy of a stat array from a 6x6 matrix of “roll 4d6, drop the lowest die”?

For character creation my group sometimes uses a weird method to generate stats. We roll 6 stat arrays using 4d6d1 (rolling 4d6 and dropping the lowest), and arrange them on top of one another to make ...
18
votes
6answers
5k views

Does the shape of a die affect the probability of a number being rolled?

Let's say I have a standard D4 and a custom D8 that has printed 1-4 and then 1-4 again (for a total of 8 sides). Would both of these dice distribute the probably of rolling any given number equally? ...
5
votes
1answer
221 views

Is it okay to suggest a dice roll as a player?

I was wondering if it could be okay in certain situations to ask for, or suggest, a test when I feel it makes sense to do so but the DM didn't ask me to roll a dice? To be more precise, I'll ...
12
votes
1answer
3k views

How do I read polyhedral dice?

I found a set of d4-d20, but apart from the d6 and the d4 (with the help of How do I read a 4-sided die?), I'm not sure how to read them and I'm new to these kinds of dice. How do you read a d8, d10, ...
53
votes
8answers
4k views

How to approximate rolls for potions of healing using only d6's?

I want to make tabletop potions of healing out of corked vials (test tubes) filled with dice. Each vial would be labeled and filled based on the potion it represents. For example, a vial for a potion ...
90
votes
13answers
24k views

3d6 vs a d20: What is the effect of a different probability curve?

What is the effect on game play of replacing d20 rolls with 3d6 rolls in a D&D 4e campaign? I started thinking about this after reading this question where the example was given of playing a d20 ...
23
votes
2answers
3k views

What is the Guild Die for?

I was gifted a set of Guildmasters’ Guide to Ravnica Dice, and, upon opening, I encountered the “guild die” (see the picture below). I’m a bit confused about what its purpose is. Could someone please ...
4
votes
2answers
100 views

How do I use the encounter chance tables in the AD&D 1e DMG?

I'm trying to set up a campaign and I'm not great at math. We play old school 1e AD&D. The 1e DMG gives two tables on page 47 for chance of an encounter. The base chance of encounter depending on ...

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