Showing posts with label d20 Modern. Show all posts
Showing posts with label d20 Modern. Show all posts

Monday, February 9, 2026

Should I put the chocolate in the peanut butter?

I think my base rules for Missions & Mayhem are done. At least, the heavy lifting is done. I've got rules that seem to work for all the areas of play I think a modern (action/adventure/investigation) setting RPG should probably cover. That doesn't mean I won't continue to tweak things here and there, but for the most part it seems good. 

Now, I've got to start work on rules for fantasy, sci-fi, horror, etc. that go along with this. Some of that won't be too hard. d20 Modern has d20 Future, d20 Past, d20 Apocalypse, etc. to draw from for ideas. And there's all of the WotC and OSR output to draw on for creatures, magic/sci-fi items, etc. 

Originally, I planned to just release the base rules as a stand-alone set. Then I'd release adventure modules or campaign settings that had the rules for adding in cryptids, horror creatures, normal D&D type fantasy creatures, near-future (utopian or dystopian) sci-fi, space opera sci-fi, post-apoc stuff, etc. as their own supplements. 

But d20 Modern core rules did include three "FX" campaign settings. One is about D&D monsters living/hiding in the real world (like Shadowrun, but modern world instead of near future), one is psychics and government conspiracies (X-Files meets X-Men), and one is hunting down the monsters that secretly lurk in the shadows (Call of Cthulhu-ish, but assuming you can and will kick the monsters' asses). 

Should I include a few tastes of the fantastic in the base rules? Or should I stick to my original plan? If you have a preference, let me know in the comments. 

I know some of my players have been waiting for me to start adding in the alien invasion/zombie apocalypse/monster hunting aspects into the game. We gamers do love our speculative fiction. I'll probably start working some of these ideas into my play tests in a month or two.  

Saturday, February 7, 2026

In Search of Elegant Design

Everything should be made as simple as possible, but not simpler. - Albert Einstein (apocryphal) 

 I haven't made a lot of progress on Missions & Mayhem this week, but what I have done feels elegant. 

When I started out, I tried to pare down d20 Modern to the bare essentials. 

Then, I started pulling in systems and ideas from other old school games to fill out systems where I didn't want to rely on a d20 system mechanic. Because d20+mods isn't always the best roll to make for every situation, and the scaling DC system gets progress backwards

But I quickly realized I had a mishmash of disparate game systems, and they didn't work well together. So the past few weeks have been about simplifying and trying to find elegant solutions to problems. 

I feel like that's what I've done recently. On the first page of my playtest document, which I share with my players, I've been putting a rundown of the various mechanics involved in the game. I'm not sure if they're reading it (I should ask), but for me it helps me keep track of what the game does and doesn't do. I'll copy/paste it here: 

 

Die Rolls: The following types of die rolls may be made in this game.

Ability Scores (character creation): 4d6, drop lowest single die. Roll six times to set ability scores.

Wealth Status (character creation, level up): 3d6, sets or modifies status level. Rolled at character creation to set initial status, and checked when a level is gained for possible changes.

Funds on hand: at the start of a mission, roll 2d4 or 3d6, multiplied by a modifier to determine additional cash/credit available for this mission.

General Proficiency Check: non-proficient 2d4, proficient 2d6, advanced 2d8, roll target number or higher. Possibly with modifiers depending on talents or Gambles.

Attacks, saving throws: 1d20+modifiers (Str for melee attacks, Dex for ranged attacks), roll Armor Class or save number or higher. Situational modifiers may also apply to attacks or saving throws.

Damage rolls: various, depends on the type of attack. Strength modifiers affect damage for all unarmed/melee weapons and some ranged weapons.

Gamble: In chases and some other emergency situations involving a general proficiency check, a player may roll 1d20 trying to roll equal or below one of their ability scores to gain a +1 bonus to a check. If they fail, they get a -1 penalty. How that ability may help must be described before the roll.

I Know a Guy: 1-2/d6 chance to know a guy in general, 1-4/d6 to know a guy related to occupation. If successful, the Hero gains information, access, or a favor.

 

I've described in previous posts how the proficiency system works, but here's a brief summary. There are combat proficiencies (access to weapons/armor, removes penalties for their use) and general proficiencies (replace skills/feats from the d20 system). Players get 2 proficiencies from their Starting Occupation (background), four or five from their level 1 character class, and if they have a high Wisdom, 1 to 3 bonus proficiencies. They gain more proficiencies at every 3rd level. Everyone starts with basic proficiency in ALL of them, and the proficiencies gained above are improvements to Skilled or Advanced levels. 

For the most part, difficulties are set. They don't scale with level as the PCs go up. That way leads to the backward progress I mentioned above. If your Hero has basic level infiltration proficiency, they roll 2d4. They can't disable any security devices with a difficulty of 9 (unless they gamble and get lucky, or get a bonus from one of their class talents and get lucky). After a few levels, if they boost infiltration to skilled, they now roll 2d6 and they've got a chance to disable that security device. A few levels more, they can boost it to advanced and roll 2d8, and have a pretty good shot at disabling that type of device. 

On the GM side, as well, the 2d4/2d6/2d8 scale, and 5/7/9/11/13 difficulty levels have been useful for a variety of systems. 

One more system that I keep finding useful is the I Know a Guy mechanic. Yes, it's a metagame mechanic. Yes, it shifts (not quite retcons) what's "known" in the fictional world. But it's goddamn useful! 

"Do we know the layout of the compound?" You do if you know a guy. 

"Can we get some uniforms to disguise ourselves?" You do if you know a guy.

"We need to get into the Grammy after party to find evidence." If you know a guy, he can get you in. 

Earlier in the design process, I had borrowed from d20 Modern the idea of equipment being unlicensed, licensed, restricted, or illegal. But it was a complex mess in play, and players were getting confused about needing both proficiency and permits to have certain types of weapons. Technically, they needed proficiency to use the weapons efficiently, and permits to legally own the weapons. They could have owned them illegally, or legally owned them without being very good at using them....

Anyway, I was working on a black market system related to this, and the abstract purchasing system (another hold-over from d20 Modern), and a Wanted Status system (with varying levels of "wantedness") for adding complications when the authorities are onto PC activities. Overly complex. 

This week, I added back in the Wanted Status, but it's binary. You're wanted or you're clear. No more "of interest" "suspect" "wanted" and "fugitive" levels. And if you're wanted, there are random encounter checks made once per mission/session, and at times when the party runs into the authorities, to see if some complication develops. 

For the black market, the I Know a Guy rule solves a lot of problems. If you're wanted, you can't buy certain items that would require you to present identification (firearms, explosives, new cars, surveillance gear) without triggering an automatic complication. But if you know a guy, you can buy from a black market source for a small mark-up in price. 

Clean, simple, elegant, and works with something I've already been developing in the rules.  

Sunday, January 25, 2026

Decision Points

The current iteration of Missions & Mayhem has much simpler character generation than its parent game, d20 Modern. That was the big impetus for me to create this, actually. Could I create a version of the game that has simple mechanics for the DM (the reason I will play newer WotC games as a player, but not DM anymore), and simple player character mechanics, but keep the flexibility of character concept creation? 

I think I've done it. The iteration I'm working on this week has a revision of the proficiency system (which doubles as both feats/skills for the game), which manages to plug a few holes I had in the system, and reduces the need for so many different mechanics. But I went over that in my previous post. 

What I want to talk about today is how I've come up with suites of proficiencies for each class to streamline character creation a bit more. This also brings it a little closer to old school D&D type games. Jeremy suggested that I still allow the option for carte blanche proficiency selection, but I don't think I need to add that to the rules officially. GMs worth their salt will know that they can house rule that for their game if they like. 

The char-gen guidelines, simplified, has seven steps listed, but one of them is math and not really a decision point. They are: 

To create a Hero, follow these steps: 

  1. Roll Six Ability Scores [Place scores as desired. Note modifiers for each.]

  2. Select Staring Occupation [Check prerequisites, note talent, proficiencies, starting gear.] p. 6-9

  3. Select Character Class [Gain +1 to Ability Score. Select proficiency suite, and a talent.] p. 10-15

  4. Modify Combat Values. [Note armor class (AC), hit points (HP), base attack bonus (BAB), massive damage threshold (MAS). Subtract modifiers from saving throws.] p. 10-15

  5. If additional languages for high Int or proficiencies for high Wis are gained, select them. p. 24-29

  6. Roll Wealth Level and Funds on Hand. Note starting vehicle. Buy additional equipment. p. 16-23

  7. Give your Hero a name, description, and a few personality traits.

This gives us seven decision points, with one of them (#5 on the list but actually 6) being situational. 

Decision Point 1: Roll your ability scores, then decide where to place them. This is the same as with d20 Modern. Even if you use a standard array instead of rolling, you need to decide where the numbers go. And it's much faster than point buy. 

Decision Point 2:  There are 19 starting occupations. I didn't modify the list from d20 Modern, just the mechanics for what they do/provide a character. Players will need to consider character concept, how the talent, proficiencies and starting gear provided reinforce or round out a concept when combined with a class, and in a few cases which of two proficiencies or a language to take (decision point 2.5?). Not overly complex, as a lot of players will rule out certain occupations out of hand. And again, the same number as in d20 Modern, so no extra burden. 

Decision Point 3: There are six character classes to choose from. Based on the ability score distribution and starting occupation, most players probably already have this decided. But it is still a choice to make. And it's the same six classes from d20 Modern. 

Decision Point 4: Here is where we finally streamline the process over the original. Each character class has three suites of proficiencies (given convenient labels). Two of the options are based on the standard advanced classes of d20 Modern (not the FX advanced classes, saving those for supplements). The third for each I just thought about what other concepts work well with each ability-score themed class. This replaces both going through a list of 41 skills and 94 feats. Well, not all of those 94 feats can be selected at 1st level, but that's how many are in the game. And experienced players know that you need to think ahead about feat trees and advanced/prestige class requirements, etc. I just counted, and there are 54 feats available to starting characters. That's a lot of comparison and deliberation. 

My version, pick one of three options, and get these four proficiencies (five if you're a Smart Hero). 

The next step is figuring out the combat values (AC, HP, saves, BAB), but that's just a bit of simple math. Take the base numbers and adjust them by the ability score modifiers.  No decisions to make. 

Decision Point 5 (Situational): If you have average or low scores in Int and Wis, there's nothing to decide. If you have high scores in either, you have some choices to make. For high Int, you get one to three extra languages. And granted, it assumes a real world setting so you have thousands of options, from the common UN languages to any world language, including sign language (take your pick), Esperanto, conlangs like Klingon or Sindarin, or even dead languages like Latin and Aramaic. This is part of the decision process for d20 Modern, only it's folded into the skills. So in a way, those 41 skill options become many many more when you factor language. And d20 Modern makes you take Read/Write and Speak as separate skills! I originally had languages as part of the stepped proficiency system (that's what my day job is all about after all), but I realized it's just a game and it's not usually fun to have to roll to see how much of the conversation in a foreign language you can understand. If you pick a language, you're fluent in it.

If you have above average Wisdom, you can pick one to three bonus proficiencies. As I mentioned in the previous post, all of the proficiencies have three levels: Basic, Skilled, Advanced. Everyone now starts with Basic level in all proficiencies. You get two from Occupation, four (or five) from Class, at Skilled level. But if occupation and class give you the same proficiency, it bumps up to Advanced. If you get these bonus proficiency slots, you can take more proficiencies at Skilled, or bump ones you have at Skilled to Advanced to start. There are 19 proficiency areas. Five for combat, fourteen for general. You'll already have up to six (or seven...go for it, Gen Alpha!) at Skilled, but if you have one or two at advanced, they're already maxed out. So it shouldn't be too much mental strain to make these decisions. 

And again, not every character will have decisions to make in this area. 

Decision Point 6: You roll for a Wealth Status level, using a 3d6 roll weighted to Middle Class. That determines what dice you roll with a multiplier for your starting Funds on Hand. Everyone gets a bit of gear from their Starting Occupation and from their Class, and the Wealth Status provides a vehicle (or two if you're Rich). And it's Shopping Time! I have made some modifications to the equipment lists, removing some obsolete or redundant items. I simplified weapons and vehicles to types rather than specific models. I'll probably truncate the lists even more before I'm done as there are still redundancies (day packs, range packs and backpacks are all different items for some reason? [They do have different capacities, but this is probably unnecessary detail.]) I've of course added some items to the list as well, things that hadn't been invented in 2001 when d20 Modern was designed, and things they just didn't include (no WD-40 style spray lubricant? That's useful stuff for an adventurer!). 

So how does this compare to d20 Modern? A bit simpler thanks to the weapon/vehicle simplification. But with hard cash/credit numbers rather than rolling against target numbers, it requires a bit more thought. The fact that you're actually spending a set amount of money, rather than just grabbing everything you like under your "wealth score" probably makes this a bit faster. 

Decision Point 7: Decide on a name, description, and a bit of personality. Standard for almost any RPG. And no, I'm not going to do the NuSR thing of making everyone roll for a random feature or three. Players can stretch their imaginations a bit, and besides the name, it's not so vital at the start of a PC's career. 

 

 

Sunday, November 23, 2025

On Track

 After a frustrating at times past 24 hours, we have our table rosters set for the 2025 Busan Tabletop Game Con. Nine tables open, and around 23 total participants. Small, but close to what we were shooting for. We had hoped for around 30 people to participate. Close. [I need to update the webpage game rosters, we had a few changes/additions during the day.]

Next Sunday, we'll be gaming it up. I'm running Classic D&D and Gamma World (4th). I was going to play in the Mothership game in the afternoon, but John M. didn't get anyone signing up for his evening board game, and we got a request from John D. to also join that game. I was gonna hop over into Cyberpunk Red, but then the last guy to sign up on the official form before I closed it wanted that spot, so I'll be free in the middle of the con. That's actually alright with me. I can troubleshoot any problems, take pictures to document the event (I'll probably do a write-up for the local expat scene mag Busan HAPS), and just get a bit of rest between my games. 

We're using the Discord server used for last summer's Daegu One-shot Extravaganza and also for the Online Summer Con. That ended up being a bit of a headache, because Rowan, who owns the server, and Scott, who is an admin, both know Discord functions way more than Justin and I. So they kept hinting at things we needed to do, saying it was simple - just watch/read a tutorial, and then letting us fumble through things until they had to step in and fix our mess. [Hence the past 24 hours' frustrations.] But we've got it done. We've got players all sorted with their GMs, and everyone has both a Discord channel on the server and a KakaoTalk (Korean version of What'sApp) group chat for their games. 

All my pre-gens for both Classic D&D and Gamma World are on my work computer, so I'll be posting them for players to look over and discuss over the next week. I also (on Friday) sorted through minis to get some suitable ones ready for Gamma World. Not all of them are the right fit, but close enough. Various D&D minis, cheap-o toys from Japan and the U.S., old MUSCLE wrestlers and Battle Beast toys... I think I will sort out minis for the D&D game as well. 

After all the organizing was done (and a few family errands), I sat down to consider my OSR Modern game design. I'm still tinkering with the Starting Occupations and class Talents, but I think I'm getting closer. I also made a list of things that probably need rules for resolution in the game (and could potentially be used to earn XP). Here's the list so far: 

What do people do in this game that require mechanics (and might earn XP)?

Movement (jump, run, swim, drive, climb)

Investigate/Gather information

Socialize/Intimidate/Bluff

Get permission/authorization/shopping

Sneak/infiltrate/avoid ambush

Drive/Travel

Hack Computers

Fist Fight/Sword Fight

Gun Fight

Car Fight

Chase/Escape

Sabotage/Destroy

Repair/Build

Heal/Treat Illness

 I plan to implement a set of Challenge Awards in addition to XP for combat. Since it's a modern setting, I want it to be able to implement genres where fist fights or car chases are more prominent than gun fights just as easily as those that do feature prominent gun fights/explosions. For Challenge Awards, I'm thinking 5% or 10% of the amount needed to gain a level for small goals, and 25% for large goals. 

And speaking of genres, I've got a list of adventure/encounter types that I want to give examples of in the book: 

Encounter/Adventure Types

Wandering Do-Gooders

Cops & Robbers

Special Forces

Hot Rodders

The Big Heist

Investigators

Explorers

On the Run

Home for Christmas

X-Treme Action

From Sea to Shining Sea

Out for Vengeance

The Conspiracy

All in “The Family”

 And while I mainly plan to keep things mundane (well, Action Movie heightened reality), I will have some notes on adding some fantasy/sci-fi to the game: 

Mundane, Paranormal, Supernatural, Sci-Fi

Setting the campaign tone. PCs are all normal (heightened reality) characters, but the world also contains: 

Mundane: heightened realism, but otherwise normal (Die Hard, Rambo, Dirty Harry, A-Team, MacGuyver, Cannonball Run, Murder She Wrote, Goodfellas, The Goonies)

Paranormal: cryptids, psychics, ghosts, aliens (X-Files, Lost, The Shining, Scanners, E.T.)

Supernatural: magic, monsters, demons, other realms (Interview with the Vampire, Stranger Things, Indiana Jones, Nightmare on Elm Street)

Sci-Fi: clones, aliens, high tech, superscience (Knight Rider, Blade Runner, Predator, V, Terminator, The Island, Bill & Ted’s Excellent Adventure)

 This should give everyone an idea of where I'm going with this idea. 

 

 

 

 

Saturday, November 1, 2025

The Past Week

In addition to Trunk-or-Treat last Sunday, and some Halloween events today (Saturday, Nov 1st, but it's Korea so...yeah), I've spent the past week working on the OSR Modern idea I posted about. 

Oh, for Trunk-or-Treat, Steven was a Luigi mashup (green hat, black hoodie, airsoft gun). His idea. I was Dr. Doom. I'll be donning the Dr. Doom outfit again tonight for an adult Halloween party. 

Anyway, back to gaming stuff. I started out writing down some Design Goals. Then I took the d20 MSRD and started fiddling. So far, I've got Starting Occupations, Classes, a revised Wealth System (which Steven says I should drop for tracking cash...and I may), and Equipment including vehicles. I've been editing the Design Goals as I work on them. Here's what I've got so far: 

Design Goals

Simplify d20 Modern to OSR levels of complexity for easier game play, but retain the character customization to allow for a variety of tropes/character types. 



Integrate skills as part of Occupations or Class Talents/Abilities



Keep the 6 Ability-Keyed Basic Classes. Advanced classes yes or no? Maybe higher level talents can replace advanced classes. 



Keep single advancement chart, to allow multiclassing as is, but rework XP amounts to be more in line with TS&R (and other OSR games). 



Keep Wealth abstract? Probably a good idea, but need to consider how, as the original system is clunky and weird. Maybe assign a “wealth level” (destitute, poor, working class, middle class, affluent, wealthy, rich, 1%?) and set % chances to purchase something at or above that wealth level, and % chance to improve level based on rewards received. Items have a Value Level (numerical? Or categorical, like wealth levels?), characters can automatically buy items under their wealth level. 

Roll 3d6 for starting wealth level, with bonus/penalty to roll from Occupation. 



Resolution Systems: d20 based combat, d6 or % based skills/abilities



Ability Scores: 3 to 18, modifiers per BX (no PR bonuses to XP though)



Saving Throws: Keep Fort/Ref/Will? Or BX style? If FRW, set target numbers by class? Or have a Good/Average/Poor save number chart for each level? Because of multiclassing, this might be better. Multiclass takes best number available.



Defense Bonus: Keep a level-based bonus? Maybe the bonus doesn’t apply if wearing armor. 



Ability Score Increase: Set to certain class levels? Only the Basic Class ability can be raised, by a set amount (+1 or +2, maybe depending on current level?)? Or just drop it, and have improvements from skill increases with level and new Talents only. 



Allegiances: No need

Reputation: No need



Weapons: Simplify. No need for 17 types of handgun. Revolver and Semiauto are enough. Players can describe it as whatever make/model they prefer.



Proficiency: Allows use of weapons, armor, vehicles, etc. A PC may select a new proficiency instead of a talent: Brawl, Martial Arts, Personal Firearms, Archaic Weapons, Advanced Firearms, Exotic Weapons, Armor, Vehicles (land, water, air, space), Computers, Language, Riding, Demolitions, Tools (thieves, electronics, mechanics, medical, forensic)

Ability Scores

To determine Ability Scores, roll 4d6 and drop the lowest die six times. Players can assign these scores as they like among their ability scores. High scores grant bonuses, while low scores give penalties as described here: 



STRENGTH (STR): Modifies melee attacks and damage rolls.

DEXTERITY (DEX): Modifies ranged attacks and Armor Class, plus modifies Reflex Saves.

CONSTITUTION (CON): Modifies hit points at each level, plus modifies Fortitude Saves.

INTELLIGENCE (INT): Modifies linguistic abilities. Low scores make reading/writing and speaking difficult, high scores allow for additional languages known. 

WISDOM (WIS): Positive modifier grants bonus proficiencies, plus modifies Will Saves.

CHARISMA (CHA): Modifies NPC reaction rolls (using a different scale from other scores).



Levels and Multiclassing



Characters have a total character level, which is the sum of all of their class levels. The PC’s character level determines how many XP are needed to gain a new level. Whenever a PC gains a level, they may add a level of a class they already possess class levels in, or may multiclass into a new one. At every third character level, regardless of multiclassing or not, a PC gains a new Proficiency. Every time a PC gains a level, they may roll 3d6 modified by Occupation. If they roll above their current wealth level, they move up one step of Wealth. 

Character Level

XP

Proficiency

1

0


2

1000


3

2500

+1

4

5000


5

10,000


6

15,000

+1

7

20,000


8

30,000


9

40,000

+1

10

50,000


11

60,000


12

80,000

+1

13

100,000


14

120,000


15

140,000

+1

16

160,000


17

180,000


18

200,000

+1

19

250,000


20

300,000



Multiclassing

Any time a PC gains a level in a class other than their starting 1st level class, they have multiclassed. Each class has levels independent of each other, and their sum is the PC’s character level. For example, Gemma Lovelace starts play as a 1st level Charismatic Hero. Once she earns 1000 XP, she could take the second level of Charismatic Hero, or take a level in one of the other five classes. She decides to go with Fast Hero. Her Character Level is 2, while she is Level 1 Charismatic and Level 1 Fast. When she earns 2500 XP and earns her 3rd Character Level, she could raise either Charismatic or Fast to class level 2, or she could gain the 1st class level in a third class. 

When Multiclassing: 

Scores: Do not raise scores. This bonus is only gained at character creation.

Hit Dice: Roll the appropriate die type for the newly gained class level and add it to the total. At 1st Character level, Gemma has 7 hit points (6 from the maximum of Charismatic Hero, +1 for her Constitution modifier). At 2nd Character Level, she rolls 1d8+1 for her level of Fast Hero plus her Constitution modifier. She rolls 3, so adds 4 hit points for a new total of 11 hit points.

BAB: Add the BAB of all classes together to get the total BAB. Gemma starts with a BAB of +0. The Fast Hero also starts with +0 BAB, so her BAB does not change at Character Level 2. She will need to raise one of her two classes to 2nd level, or take a level of Strong Hero to improve her BAB at 3rd character level. 

Saves: Take the best score of any class/level available. As a 1st level Charismatic Hero, each of Gemma’s saving throws are 15. At 2nd level, when she adds Fast Hero, her Reflex save improves to 13. The Fortitude and Will saves do not change. 

Proficiency: Do not add starting proficiencies. These are only gained at character creation. Characters may add new proficiencies at every third Character Level. 

Talents: Add talents based on class levels. At 2nd Character Level, Gemma has both one Charismatic Talent and one Fast Talent. 




Wealth

Wealth is an abstract concept in the game. Rather than dealing with hard numbers for currency (and dealing with rent, utilities, loan payments, investment dividends, insurance, and other unfun factors of modern life), each PC has an abstract level of wealth. Items and services are given an abstract Value level. If a PC wishes to purchase something with a Value level lower than their Wealth level, they may do so without question (although for large purchases, this may take some time in game). If the Value level is equal or higher than the Wealth level, the character must make a check to see if they have enough cash or credit on hand to manage the purchase. Starting characters roll 3d6, modified by their Occupation, to determine their starting wealth level. When they gain a level, they may have a chance to improve their financial standing based on payment and rewards gained, or their out-of-game business dealings. 


Roll

Wealth Level

Value Level

2-3

Destitute

Insignificant

4-5

Poor

Cheap

6-8

Working Class

Minor

9-12

Middle Class

Major

13-15

Affluent

Significant

16-17

Wealthy

Luxurious

18

Rich

Extravagant

19-20

1%

Exorbitant