Issues related to designing RPG system mechanics.

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4
votes
3answers
2k views

Calculating dice pool probability with limited rerolls

I need a probability calculation script that works with various dice and dice pool sizes, that accounts for a mechanic that allows you to reroll up to X dice that are failures, but ONLY once per die. ...
9
votes
2answers
432 views

Where can I learn how to design my own RPG?

Let's say I have an idea for my own tabletop roleplaying game. Where can I go to learn more about how to design and publish my RPG? In particular: How can I find advice and resources to help me ...
11
votes
5answers
999 views

Looking for game with a specific initiative system

In working on a new game system, I'm looking for any relatively-balanced system that uses initiative in a specific way. I'm just looking for a reference point and inspiration, or if anyone else has ...
-1
votes
3answers
597 views

Is rolled death during character creation ever OK? [closed]

Is it ever Ok to have a Diceroll made during character gen kill or cripple a character before they are played? I know in certain Systems, this is almost true if you are really unlucky at rolling. (Eg ...
6
votes
2answers
178 views

Where could I go to find editing services that specialize in RPGs?

So I have had a time travel themed RPG successfully kickstarted and am entering the stage where I await feedback from the playtesters. In the meantime, I am searching for editing services that ...
9
votes
5answers
433 views

What are the essential design features of a combat system that make it scalable from single combat to mass warfare?

My question stems from this post by p.marino, as it raised my curiosity. I do not wish to spend the time and money to acquire and read Silhouette Core. Furthermore, I lack the knowledge of piles of ...
6
votes
1answer
440 views

Average Damage Output in 4e?

Is there a resource that lists the average damage output for each role (Defender, striker, leader, controller) that is divided into ADO per level or at the very least ADO per tier? I am really just ...
10
votes
1answer
437 views

Recommendations for game mechanics that emphasize reagent or component based spellcasting

I'm researching spell component systems for a 3.5e campaign. In 3.5e, spell components are an inconvenience at best and a waste of time at worst. I'd like to homebrew a solution drawing from mechanics ...
12
votes
4answers
5k views

What are the major innovations in Dungeon World compared to D&D 3.5/Pf/4e?

In various comments on this site, DW was mentioned as [Dungeon world/Apocalypse World] is really more required reading for any designer today working on innovation in mechanics Having read the ...
1
vote
0answers
117 views

Managing complexity due to concrete-scale rules [closed]

We are rolling out an RPG system for the fun of it. However, recent tests have lead us to a rather unsolvable problem. In order to make single combat interesting and hopefully realistic, close-combat ...
1
vote
1answer
242 views

Any rules or supplements for mass combat in Underwater or Aerial fantasy environments?

I want to create a Pathfinder campaign for my players that culminates in a war between fantasy cities. I've been researching mass combat rules looking for something comprehensive that effectively ...
8
votes
4answers
630 views

Game design differences between contested rolls and general attack rolls in combat

Background: Our group does D&D 3.5/4e one week, and a different system the other week (we've done GURPS and Serenity, and I'm going to be running Mutants and Masterminds 3rd edition). I've ...
8
votes
3answers
2k views

Structure for a political sandbox game

I am looking for a fairly structured approach to creating, preparing for, and running a political game. To be more precise, I am looking for the following: A structured approach or even a game ...
5
votes
5answers
596 views

Is there a Open Game License (OGL) or similar life-path system out there?

I've decided to try and "build" a system of my own, and I've decided to make it a "life path" system but I don't really want to start from absolute scratch, but thus far I've haven't found any open ...
4
votes
1answer
503 views

What are the most common design problems found in games based in levels and classes? [closed]

I am starting to develop a home-brew system along some members of our group, and one of the things we have to decide is the advancement system. We are divided between point-based and class/level, ...
1
vote
1answer
1k views

How would you create a MtG RPG Campaign/Game? [closed]

There was a MtG computer game published years ago which provided a campaign style game. The player travelled around a map comprised of differing terrain. This terrain was one of the MtG land types, ...
15
votes
10answers
1k views

Difference in basing damage on degree of success compared to a separate roll

So I am thinking about my own homebrewed system, and am wondering how to implement damage. I am considering two types of system here: Damage is rolled separately (base on weapon), and success of the ...
17
votes
6answers
849 views

Is the use of XP as a narrative currency for both GMs and players a novel idea?

In Monte Cook's new roleplaying game Numenera, XP is used as a narrative currency not only by the GM but by the players as well. Taken from his design diaries: Say the PCs find a hidden console ...
8
votes
1answer
266 views

What purpose does keeping Vancian Spell-casting in Legend serve?

I've got to admit, I'm somewhat confused by the option to keep Vancian-style spell slots for the Shaman and Tactician casting tracks. Most tracks in Legend either provide abilities that are at-will or ...
3
votes
1answer
618 views

Designing stats for ReBoot Tabletop game

As a personal project I am working on creating a tabletop game based on one of my favorite childhood shows. The show is ReBoot. One of the things I am having a rough time designing is a simple stat ...
13
votes
2answers
270 views

Who should be addressed in an RPG rule text?

When reading RPG rules text, I have noticed that the text sometimes rather inconsistently switches between assuming that the player is doing the reading and that the character is doing the reading. ...
13
votes
7answers
2k views

D&D: How to find out if someone is a spellcaster?

I know that one can use the spell "Detect magic" to find out whether any spells are being cast or active. But is it also possible, using some spell, feat or whatever, to find out whether a person is ...
9
votes
4answers
1k views

What are the best ways to utilize Wisdom and Charisma?

This question primarily refers to a fantasy RPG called "One Step Beyond", published back in 1989. It had five ability scores: Strength, Mental Strength, Will, Agility, Health. These were essentially a ...
9
votes
1answer
427 views

Why does (A)D&D change so much between editions? [closed]

Most systems, as far as I know, stay mostly the same between editions. Yet Dungeons and Dragons has had major changes between almost every edition, with the skill systems, combat abilities/feats, ...
2
votes
4answers
486 views

Handling many modifiers on a probability curve

So I've been working on a 2d20 based system for a side project, and it's playing out as a hybrid of a roleplaying system and a simulation-heavy combat game. This means that the engine has quickly ...
7
votes
2answers
1k views

Creating my own RPG but having a hard time. Need advice

I've been playing tabletop RPGs for 20 years and I finally mustered the courage to create my own RPG. The problem is that I've gotten very discouraged as of late. I asked my local gaming community ...
6
votes
3answers
519 views

Do universal rules systems without any implied setting whatsoever exist?

Is it possible for a system to be universal without implying anything about setting? If it isn't, why? There are lots of universal systems, but they all seem to have mechanics that pin down ...
25
votes
10answers
2k views

How do I balance game interactions between a giant mecha that can level cities and its pilot?

I have had recurring trouble with a subject I like, and would like to implement into my games, but can't find a good way to do so: mechas (big huge robots) From a system point of view, it is usually ...
12
votes
6answers
749 views

Is the concept of a mutable game system viable?

I've been toying around with some prototypes for game systems, and I'm wondering if "mutable" RPGs (games where the rules of the game are represented and can be interacted with/changed in game) are ...
3
votes
2answers
188 views

Combat - What is the chance of hitting someone on Range? [closed]

I'm designing a game system, and am working on the combat system. I have several questions, and I'm trying to create a system that is as realistic as possible. Sadly I have no experience with guns or ...
4
votes
4answers
527 views

“High on Magic” - how original is it? [closed]

I have written a RPG called "Chuť magie" - it's in Czech and it means literary "Taste of Magic", but I'd definitely call it "High on Magic" in English. I'm not planning to translate it to English ...
5
votes
3answers
283 views

How to implement dual-classing in a non-levelled RPG game?

I'm working on an alternate ruleset for a tabletop pen-and-paper RPG (like D&D). Recently I've been toying the idea of abolishing a level system. However, I don't want to remove the ability for a ...
5
votes
5answers
266 views

Character turn mechanic that is both detailed and handles long actions

We play according to a homemade-ish freeform-ish system. I, as a GM, have a lot of fun with the system as I morph it. And the benefit for the players is that the whole thing is a one-pager. But we ...
4
votes
2answers
239 views

Are there any game mechanics for handling item condition in detail?

Many sources (ex) point out that a distinct advantage of non-metal armour is that it does not rust in the rain. Also, "adventurers", carrying all their belongings on their back, pretty often find ...
6
votes
4answers
840 views

What can be done to maintain balance in a magic system in which mages must construct their own spells?

I'd like to build a magic system in which every spell is a one-off. A spell is created to serve a particular purpose and is cast once. I'm thinking that the time and place of the casting would be ...
10
votes
3answers
441 views

How do I make headshot rules interesting?

I'm working on a unified conflict system for a lightweight setting-agnostic RPG ruleset. The beta version is available on my website, although I have changed a lot of rules since that was released. My ...
13
votes
10answers
4k views

What are common design flaws of build-point game systems?

I'm designing my own RPG system and I want to avoid the most widely-recognized flaws, loopholes, and exploits that build-point character creation systems usually suffer from. What are the most common ...
12
votes
2answers
2k views

What didn't Monte Cook like about 4e?

It seems to be an established tenet of the conventional wisdom that Monte Cook does not like Dungeons and Dragons 4th Edition. However, I came late to this party and never read the criticisms Monte ...
26
votes
16answers
4k views

How to design game elements other than combat? [closed]

Most RPGs I know about and have played are fighting-centered. That doesn't mean that all gaming is only about fighting, but that most of the rules and character abilities are primarily useful in ...
1
vote
1answer
439 views

Combat and exp/gold reward equations

I have a pen and paper game that I'm creating, but I'm running across issues in keeping the ratios between high and low level players similar in the battle and reward equations. Obviously a higher ...
16
votes
5answers
834 views

Cooperative character building?

I'm aware of games where the players cooperatively build elements of the story world (I hear Dresden Files does this), but are there any where the players cooperatively build their characters? What ...
11
votes
2answers
532 views

Water and electricity spells - RL physics approach [closed]

I like to master (and play) in a world I can believe (even fantastic ones). This question comes from D&D3.5 but applies to every game where reality collides with things you can't (usually) do. So ...
4
votes
3answers
800 views

Which systems use a dice pool *and* highest score mechanic?

I'm trying to design a system with a dice pool mechanic that looks at the highest roll in the pool as well as total number of successes? I want to show the quality of a success and it's extent. ...
7
votes
1answer
409 views

How can I simplify a series of rolls without changing probability too heavily?

Ok, I'm working on a combat system converted from a video game to a tabletop game, and I'd appreciate some feedback on how I can make my combat defense system work. Currently attacking is handled as ...
17
votes
6answers
513 views

What are some examples of games that don't invent history or language? [closed]

IE, games that don't make up words or names in languages belonging to the game-verse, but borrow as exactly as possible from history, folklore, etymology, and mythology. (What is this type of game ...
13
votes
3answers
264 views

What kinds of player contributions work well and under what circumstances?

Introduction In Amber diceless roleplaying game players get extra points for building their characters by committing to player contributions, such as: Writing a diary, writing game reports, drawing ...
6
votes
4answers
299 views

How can adversarial game mechanics be added to a game?

Some systems have the concept of an adversarial relationship between the game master and the players. These games typically have a series of mechanics to enforce this behavior and prevent one side ...
6
votes
6answers
726 views

Chuck Norris player character - can I keep true to the internet meme while still running a balanced game?

One of my group mates has been quite obsessed with creating a Chuck Norris inspired character. He's playing a martial arts heavy, assassin flavors of Rogue, in a DnD campaign, which works well enough ...
6
votes
2answers
431 views

Handling merchant inventory with lots of items?

Ok, so I'm converting a roguelike video game to a tabletop game (GearHead, if anyone's interested), and I'm running into a catch where I want to keep the tabletop game essentially compatible with the ...
8
votes
3answers
872 views

Do these stats cover enough of a person's ability?

I've had this thought in my head for a while, as I'm developing my game, but this question really sparked me into posing the question. In the game I'm developing, peoples normal stats/attributes ...