Issues related to designing RPG system mechanics.

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4
votes
3answers
174 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. ...
7
votes
2answers
185 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 ...
12
votes
5answers
287 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
vote
0answers
49 views

Need advices for short form RPGs (techniques and inspiration) [closed]

Rewrite of a too broad question I want to create a short form RPG but I lack experience and I'd like some pointers and/or some experience from the field. More precision : My friends and I have less ...
0
votes
3answers
254 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
151 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
297 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 ...
3
votes
4answers
317 views

How to create battles in a war

I've been creating my own campaign loosely basses on the Eberron campaign setting (as in very loosely, I've only been using the names of countries & cities to create my own map). I was planning ...
1
vote
3answers
169 views

How to implement multiclassing during character creation?

Assume I want to have characters defined by classes, archetypes, whatever. And there's no advancement, or at least sufficiently little advancement that the choices made at chargen always define the ...
5
votes
1answer
217 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
344 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 ...
7
votes
4answers
766 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
83 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 ...
7
votes
2answers
520 views

How can I convert D&D Next Saving Throws into Defences?

In the last public playtest packet, saving throws for spells had the following formula: The DC was set to 8 + prof bonus + magical stat bonus. The target would then throw a saving throw, adding their ...
5
votes
4answers
352 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 ...
1
vote
1answer
141 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 ...
6
votes
4answers
315 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 ...
31
votes
14answers
1k views

What kinds of rules promote good team cohesion?

It seems like a lot of roleplaying games have no problems with players playing antisocial characters who can't really be part of the team. I've been part of groups (in D&D) with both a noble ...
15
votes
5answers
473 views

How would you play test an RPG before all of its rules are complete?

I've been writing my own RPG, mainly to address some of the flaws / frustrations I've come across in other games. Luckily, I've found a few willing participants to help test the rules and mechanics in ...
8
votes
3answers
587 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
251 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 ...
3
votes
1answer
233 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
348 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
468 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
611 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 ...
26
votes
16answers
3k views

What alternatives to hit points are there for abstracting wounds?

I don't like hit points as an abstraction anymore. I'm interested in writing an RPG and I have some ideas for other ways of handling wounds, but I wanted to see what else was out there. MERP had ...
7
votes
1answer
157 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
252 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
213 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
1k 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
582 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
275 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
248 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
583 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
346 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 ...
2
votes
2answers
130 views

What resources should I use to create a mod for d20 Modern?

This is a tangent off of my question about Looking for a Space marine RPG similar to Starship Troopers (the Novel) where there were some good suggestions about systems to use or modify to meet my ...
22
votes
10answers
782 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
632 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
164 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 ...
3
votes
4answers
387 views

“High on Magic” - how original is it?

I have written a RPG called "ChuƄ 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
247 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 ...
16
votes
10answers
660 views

What would you pick as the “four elements” of mind? [closed]

Good evening! I hope this isn't too vague, this is my first post on RPG Exchange (I see some cool conversations here, I'm happy to be a part). While doodling about with a magic system I'm ...
2
votes
1answer
127 views

How to balance orcs and uruks PCs

As weird as it sounds, I like to play the other side in RPG stories, or at least, design how to play. In old MERP PCs could be of the Middle Earth evil races (orcs, half-orcs, uruks, trolls, ...
11
votes
3answers
2k views

Common Dice Mechanics [closed]

I'm thinking of doing a study/paper/educational-piece about different dice rolling systems in RPGs and other games. I've played RPGs in the past but it's been years so I wanted to be sure I knew the ...
5
votes
5answers
231 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 ...
6
votes
3answers
433 views

A system for tactical magic duels with low handling time?

I'm trying to cobble together a solely magic-based campaign that will have a really flexible system of magic. I've always been a fan of the D20 system, but it does have its limitations: for this ...
4
votes
2answers
200 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
472 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
324 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 ...
12
votes
10answers
2k 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 ...