Fantasy Manager Field Guide

The daily loop

You run a business empire one day at a time. Each day you assign workers to jobs in your buildings, press Next Day, and read the Daily Report. Here is what happens behind that button, in order:

1. Bankruptcy check. If your money is at −5,000 or lower, the game ends.
2. Timed traits tick down (Sick, Pregnant, Poisoned…), then the calendar moves forward one day.
3. Morning upkeep for each worker: max health and energy are recalculated, comfort adds joy, and joy and relationship adjustments apply.
4. Franchises pay out, then every assigned worker does their daily stories (jobs).
5. Income and costs are added up. Costs are building upkeep plus worker comfort.
6. Death check, then the nightly rest: health, energy and libido regenerate.
7. Level-ups for skills and workers.
8. Money is applied, followed by another bankruptcy check.
9. Governor events, then random events, then the Daily Report.

Starting out

• You start with $6,000 and Building 1, which you can never sell.
• The Journal holds 16 objectives. Objectives 1–7 complete on their own. From objective 8 onward you press "Mark as Complete" yourself. Objective 15 asks for 3,000 income in a single day.
• The story ends in an Assassination or Blackmail ending, depending on the path you chose at objective 9.

Difficulty

Workers

Workers come from three places:

• Bought at the market. They want little comfort (around 1). Only bought servants can be sold, for level × 500.
• Recruited through recruitment events. You can start one a day from the menu. They want more comfort (around 4).
• Captured monsters, which can drop as loot from successful guild jobs.

Any worker can be fired, which pays nothing. Workers that aren't for sale can still go to a specialty buyer through the level-5 Discipline interaction (see Interactions).

Stats at a glance

How workers grow

• Worker level: successful jobs fill a counter. At 20 × current level successes the worker levels up and the counter resets.
• Skills grow with use. Every job adds a use to one of the skills it rolled, and enough uses raise the skill by 1. The cost in uses rises with the skill: 1 use at 0, about one more every 15 points up to 75, then it climbs steeply. Training and the Academy also add uses.
• Each level or skill point gained lowers rebelliousness by the worker's comfort level.

Rest, regeneration and death

• Every night: health +level +1 (+traits), energy +level + (comfort − 1) (+traits), libido +1 + level − 1 per sex job that day (never below −2).
• The Rest job in every building gives extra energy. With auto-rest on, tired workers rest by themselves below 35% and go back to work at 95%.
• Auto-potions: workers below 30% health or energy drink potions from stock at the start of the day.
• Death: up to 10 graves are kept at the Church. Resurrection costs 5,000 + 1,000 × (level − 1).

Libido (NSFW mode)

• Max libido is 20, plus traits and items.
• Sex skills get +libido ÷ 2.
• On non-sexual jobs, high libido is a distraction: −5 skill at libido 20, and −1 more per point above.
• If libido would drop below 0, the overflow becomes rebelliousness.

Getting workers

How every worker in the game joins your house. Generated workers (new names, random skills) also turn up in the market and in Recruit Workers once the named ones run out.

Recruited (20)

From the map: Recruit Workers, once a day. Unique workers only appear in the content mode their sheet belongs to (an SFW-only worker is never offered in NSFW mode, and the other way round). When every unique has been hired, Recruit Workers offers newly generated workers instead.

Bought (24)

From the map: Buy Servants. Five offers a day; one free refresh, a second one for $2,500. NSFW-mode games can also be offered the SFW workers below.

Joined through a story (5)

Monsters (8)

Only in NSFW mode: Monster Taming is an NSFW job.

Buildings

Each building has jobs (professions). Each job has a number of seats that grows by 1 per building level. Every building also has a Rest job with unlimited seats.

Buying, upgrading and changing

• Map spots: Tavern $15k, Bluehouse $20k, Redhouse $25k, Greenhouse $30k. Each spot only allows some building types; the Greenhouse takes any.
• Upgrade from level N to N+1 costs N² × 1,000 ($1k, $4k, $9k, $16k). The max level is 5.
• Change type for $1,000. This resets the building to level 1, 0 reputation and no skill bonus.
• Sell a building for its purchase price − $5,000 (not Building 1).
• Building skill (Hag Potions, Ingredients, Equipment…) = level × 10, plus up to +50 in bonuses. It is used for building checks in random events.
• Reputation rises with good jobs (+10 critical, +5 success, −5 failure) and brings more stories per worker. Its cap is level × 200, plus your best manager's level × 200.

Daily costs

• Building upkeep: 100 / 300 / 500 / 700 / 900 for levels 1–5 (×2 on Hard, ×3 on Nightmare). Your first building pays no upkeep at any level, and the Governor's Castle always pays the level-1 rate.
• Comfort: comfort level × 20 per worker on Normal (15–30 depending on difficulty).
• Skill bonus: $100 per +10 building skill bonus.
• There is no separate wage per worker any more; comfort is the wage.

Jobs and earnings

Each worker does at least 1 story per day. Busy buildings add more: reputation ÷ 400 extra stories per worker, up to 6. Each story rolls d100 against the worker's skill:

The target is the average of the story's skills, adjusted by story difficulty, the worker's matching traits (about ±3 each), staff synergy and policies, capped at 100. Some relationship stories can't fail.

Pay comes from each story's own formula, usually 50 + skill on success and 50 + skill × 2 on a critical. Mediocre pays about the skill value. Failure costs money: the further the roll missed, the more it costs, but only half of what the formula says (since 0.9.6.2t1). On top of that:

• Traits multiply pay. Each trait counts for at most ×1.2, and all traits together for at most ×1.5.
• Business Acumen adds +10% per point.
• Staffing: if a building's core job is empty (Prostitute, Cook, Adventurer, Bartender, Dealer), everyone in that building earns ×0.5. A staffed Expert Attendant gives the Brothel ×1.1. Each Service, Server or Entertainer worker adds +1 to every roll in their building (up to +40).
• Difficulty and the monthly card multiply the final amount.

Managers and management skills

• A Manager seat in a building calms it down: each manager lowers that building's random event chance by 10 points (minimum 5%). Managers also raise the building's reputation cap.
• Your own management skills add +5 per point to the matching worker skills and stats. They are Whore Mastery (sex skills), Combat Instruction (Combat, +10 health), Servant Training (−10 rebelliousness cap), Gang Leader (+10 energy) and Business Acumen (+10% earnings).
• Manager Level raises how many interactions you can do per day (2 + level).

Monthly conditions

From the third month, every month draws one card from a deck of 16. A card raises or lowers some skills (±10) or the earnings (×0.9–1.15) of certain buildings or jobs. The same card never comes up twice in a row, and you can switch the system off.

Franchises

Franchise Holdings are off-map businesses: $10,000 to set up, upgrades at level² × 1,000. Workers sent there leave the roster and earn about 10 + 1.5 × level + 0.75 × average skill per day.

Traits

There are 205 traits. Races (Human, Elf, Dwarf, Orc, Ogre, Demon, Angel, Goblin, Half-Breed, Slime, Centauride, Transformed) are traits too. A trait can:

• Add or remove skill points, health, energy, libido and regeneration.
• Multiply earnings, from ×0.5 (Reforming) up to ×1.2 (Idol, Porn Star, Transformed).
• Set caps and minimums (e.g. Dependant caps rebelliousness at 50).
• Change stats every day (e.g. Obedient: −1 rebelliousness per day).
• Expire after a number of days: Sick 7, Poisoned 7, Cursed Vitality 7, Pregnant 100, Trial Worker 30.
• Conflict with other traits. Gaining one removes the other, e.g. Rebellious vs Dependant, Obedient and Meek.

Magic traits stack: Strong Magic, Powerful Magic and Psychic all need Magical first.

Races (12)

Every worker has one race. Races are traits too.

Traits workers can be born with (111)

New workers roll their traits from this list.

Story, status and reward traits (74)

Never rolled at random: they come from events, recruitment choices, interactions, the governor, the Arena or a character's story. Temporary ones show how many days they last.

Items and shops

• Equipment: a worker can wear one weapon, one armor, one clothing and one accessory. Equipping a second item of the same type swaps the first out. Items have no durability.
• Consumables and gifts are used up. Gifts give small boosts to joy, romance and relationship (+1 or +2 each).
• Ingredients are for Academy alchemy. They are sold in the Basic Shop and drop from guild jobs.

Some items only show up on some days. Example: the Amulet of Desire (468 gold, +5 max libido, +2 libido regen) sits in the Adventurer's Market. The Elixir of Passion (1,000 gold, +10 libido) is in the Elite Emporium every day and is also a rare loot drop.

Interactions

From a worker's details you can spend interactions on them. You have 2 + Manager Level interactions per day, shared by all workers (training counts too).

• Friendship (needs relationship 25 / 50 / 75 / 80 for levels 2–5)
• Romance (needs romance 25 / 50 / 75 / 80)
• Discipline (needs rebelliousness below 80 / 75 / 50 / 25)

Each category has levels 1–5. To open a level, you need to have done the previous level once and to meet its stat requirement. Costs are small: a gift costs 300, a Friendly Lunch 150, and so on. They come out of your money and the worker's energy.

Level-5 finales

Finishing one finale locks level 5 in the other two categories. Each finale trait also unlocks its own relationship stories in the worker's daily jobs.

Training and walks

• Training (25 skills) first asks the worker to accept: the chance comes from comfort and rebelliousness, between 10% and 98%. If they refuse, you can let it go, insist or punish. A successful lesson adds skill uses.
• Repeat redoes the last interaction or training with the same rules.
• Take a Walk picks a random worker and a random Friendship interaction once a day, for free.

Random events

• At most one random event a day.
• Normal events need a working worker. First a 30% roll, then each event rolls its own chance: 30 − 10 × managers in its building (minimum 5%).
• Story, quest and character-arc events roll their own chance (usually 50%), and managers don't reduce it. Guaranteed and fixed-date events fire first.
• Events have cooldowns (usually 5–30 days) and some only happen a set number of times.
• Choices can need a worker with a skill above a threshold. The chosen worker then rolls d100 against that skill.
• Some choices list several minimums ("requires Combat 70, Agility 55"): only workers meeting all of them can take it. Marked guaranteed, the choice has no roll and always succeeds.
• Building level boosts what events pay: money +10% per level above 1, reputation +30% per level.

The Governor

From objective 8 the Governor starts watching you, and attention grows with each objective. After the path you choose at objective 9 comes a one-time retaliation: 1–2 workers are poisoned. From objective 10 the Governor can strike any day. Strikes poison a worker, sabotage a building's skill for 3 days, or let a spy steal 5–15% of your money.

Goals and milestones

The Journal walks you through 16 objectives, from your first hires to the night the governor falls. Objectives 1–7 complete by themselves; from 8 on, open the Journal and press the completion button (scroll down if you see the arrow).

The ending

Both paths of the final strike end the governor's story and give the same rewards:

• The Governor's Castle, at the maximum building level, with its own jobs. It always pays the level-1 upkeep.
• +1 Manager Level (one more management skill point).
• Franchise Holdings: "Buy Buildings Abroad" appears on the map.
• The governor's pressure stops, and the fear traits it left on your workers are removed.

Manager Level and skill points

Each Manager Level gives one management skill point (see Managers and management skills). There are four ways to get a level, each only once, so the highest Manager Level is 4:

Places to unlock

• Academy: 15,000 coins of tuition, or 7,500 if you haggle successfully (a failed haggle waits until the next day). Training courses, the curriculum, the library and the laboratory.
• Laboratory: a one-time 6,000-coin pass, then a session every 3 days. Basic batches turn out Health and Energy Potions.
• Arena: the Lanista sells the permit for 10,000 coins. Then an opening trial: a Combat roll that one of your fighters must pass before the Arena can be used.
• Church of the Circle: find the four seals, one per day, then perform the ritual in the right order. After that you can resurrect fallen workers for 5,000 + 1,000 × (level − 1). The cemetery holds 10 graves.
• Adventurer's Market: unlocked by helping an indebted shop owner (an event from objective 7 on; it comes back if you decline, and is guaranteed after day 90).
• Elite Emporium: the same owner offers it about 20 days after the Market opens, for 10,000 coins. If you decline she returns 21 days later; it is guaranteed after day 120.
• Franchise Holdings: after the ending. 10,000 coins to establish each type.

What changed from the old guides

If you read the earlier Game Mechanics Guide or Game Reference, these are the rules that no longer hold.

Job roll

target   = average(skill_options, effective skills)
         − 10                         (Nightmare only)
         − libido distraction         (non-sexual jobs, libido ≥ 20)
         + story difficulty_modifier
         + 3 per positive trait − 3 per negative trait   (story's own weights override)
         + staff synergy (cap ±40) + policy focus
target   = min(100, target)

roll     = d100
critical : roll ≤ min(25, max(1, round(target × 0.10)))
success  : roll ≤ target
mediocre : roll ≤ target + 10
failure  : otherwise          (no_fail stories turn this into success)

One of the story's skills is picked at random to gain a use.

Effective skill

effective = min(base, 100)
          + trait skill_modifiers
          + equipped item skill_modifiers
          + floor(libido / 2)          (sex skills, NSFW on)
          + 5 × management skill        (Whore Mastery for sex skills, etc.)
          + monthly card modifier       (during jobs)

The sex skills are Sex, Anal, BDSM, Hand, Oral, Homo, Special, Group, Extreme and Striptease. The SFW skills are Combat, Clever, Charm, Service, Agility and Craft.

Earnings

pay = story formula for the outcome     ("50 + skill", "-(roll - skill)", …; skill = target)
pay × staffing      (clamped 1/3 … 3)
pay × difficulty    (Story 1.3, Easy 1.15, Normal 1, Hard 0.85, Nightmare 0.7; gains only)
pay × trait mult    (each ≤ 1.2, total ≤ 1.5; gains only)
pay × (1 + 0.1 × Business Acumen)
pay × monthly card
failure: loss halved (rounded up), then floor: Story → 0, Easy → −25

Stories per worker

effective_rep = min(reputation, level × 200) + best manager level × 200
stories       = max(1, base + reputation_formula)     base = 1, formula = effective_rep / 400

Worker formulas

Building formulas

Reputation tiers

Data files

Everything lives in game/data/ and can be edited with the Devkit or a text editor.

Worker fields

Daily story fields

{
  "id": "prostitute_vanilla_client_male",
  "weight": 4,                          // how often it is picked
  "report": "Client paid for Sex",      // title in the Daily Report
  "difficulty_modifier": 5,             // added to the target
  "skill_options": ["Sex"],             // skills averaged for the roll
  "worker_gender_requirement": "male",
  "excluded_traits": ["Gay"],
  "required_traits": [], "stat_requirements": {},
  "negative_traits": {"Shy": 3},        // −3 to the roll
  "earnings": { "success": "100 + skill", "critical_success": "100 + skill * 2",
                "mediocre": "skill", "failure": "-(roll - skill)" },
  "story_image": "prostitute_vanilla_client",
  "failure_image": "prostitute_vanilla_client_failure",
  "descriptions": { "success": "…", "failure": "…", … }
}

Trait fields

modifiers (earnings_multiplier, skill_modifiers, health, energy, health/energy_regeneration, libido, libido_max, libido_regeneration, joy, romance, relationship, comfort_desired…), daily_effects, attribute_caps, attribute_minimums, skill_caps, conflicts, removes_traits, requires_traits, duration, on_expire, gender_restriction, nsfw.

How the game picks an image

Worker art goes in game/images/workers/<folder>/, where the folder is the one named in the worker's JSON. Formats: .png .jpg .jpeg .webp .webm .mp4. Only profile is required. Every other image is optional: when a name isn't found, the game quietly moves to the next step of the chain, so a worker with just profile and skill art already covers the whole game.

The fallback chain

daily story / event image   (story_image, failure_image, success_image)
   ↓ missing
skill image of the roll     (sex, oral, combat… see the grid below)
   ↓ missing
rest                        (rest stories only)
   ↓ missing
profile                     (always exists)

Image browser

Adding a new worker

1. Add the worker to any JSON file in game/data/workers/ (copy an existing one). No code changes needed. To share it, pack it as a character pack: see the Mods tab.
2. Create game/images/workers/<folder>/ with at least a profile image.
3. Add art in this order of value:
   • Tier 1: profile, rest
   • Tier 2: the 16 skill images and their _failure versions. With these, every job, event and training already shows something that fits.
   • Tier 3: interactions: friendship, obedience, romance_lord / romance_lady, then the specific discipline_*, friendship_*, romance_* and Training_* images.
   • Tier 4: story and event images for the jobs this worker will do. The Daily stories list above, filtered by building and profession, shows every name a job uses.

Installing mods

Mods come as a ZIP file (from the Discord, F95 or itch.io pages). Most are character packs: new characters with their images and, often, their own traits, recruitment scene, story events and daily stories.

With the in-game importer (PC and Android)

1. Main menu > Mods > Install mods > Choose ZIP or folder. On Android, the system file picker opens; choose the ZIP.
2. The game checks the pack and shows a summary: characters, images and size, plus a line such as "Also adds: 3 events / 1 recruitment scene / 8 daily stories / 3 traits". Read any warning below it.
3. Press Install this pack, then close and reopen the game.

Installed packs are stored next to your saves, never inside the game folder, so updating the game doesn't remove them. They only add content: no original game file is changed. The pack's characters follow your content filter (NSFW characters stay hidden with NSFW off), and its events and stories are added to the game's own.

By hand (PC)

Character packs made with the Devkit, or packed the same way, have a game folder and a README.txt inside the ZIP:

1. Close the game and extract the ZIP.
2. Drag the game folder onto the game's main folder (the one with Fantasy_Manager.exe) and choose to merge the folders. A character pack only adds new files.
3. Start the game.

Uninstalling

• Importer: Mods > Install mods > Uninstall next to the pack, then restart. You can cancel before restarting. Saved characters stay in your save, but the pack's images, events and stories are no longer available.
• By hand: delete the files listed in the pack's README.txt, then restart.

What the importer's messages mean

Packs with events, traits and daily stories need a game version newer than 0.9.6.2t1. Version 0.9.6.2t1 imports only the characters and their images from those packs.

Kinds of mods

The Devkit (also under Mods > Create Mods) builds and checks all three in your browser.

Make a character pack in 5 steps

1. Start from the example. Download the Mira example pack: a working pack with a character, 2 traits, a story event, a recruitment scene and a daily story. Or build one in the Devkit, which writes the same layout.
2. Make it yours. Rename Mira everywhere: name, folder, worker_name, has_worker:Mira, the file names and the image folder. Also give your traits, event ids and story ids new names. The importer rejects names the game already uses.
3. Add images to game/images/workers/<YourFolder>/. A profile image is required; the rest follow the names in the Images tab.
4. Zip it with README.txt and the game folder at the top of the ZIP. List your files in the README so players can uninstall by hand.
5. Test it: Mods > Install mods, check the summary counts every file you expect, install, restart and start a new game.

What goes in a character pack

MyPack.zip
├── README.txt
└── game/
    ├── data/
    │   ├── workers/mypack.json                       characters
    │   ├── traits/mypack_traits.json                 new traits
    │   ├── events/events_mypack.json                 story events
    │   ├── events/recruit/event_recruit_mypack.json  recruitment scenes
    │   └── buildings/daily_story_extensions/mypack_stories.json   daily stories
    └── images/workers/MyFolder/                      the character's images

Every part except the images is optional. A pack can be just a character, or just events and stories for characters already in the game. Use file names nobody else will use (events_mira.json, not events.json): in a by-hand install, two files with the same name overwrite each other.

Not allowed in character packs: items, buildings, interactions, monthly conditions, and scripts (.rpy, .py). Use a JSON override for data changes; scripts are never imported.

The character

A JSON list in data/workers/. The fields are the same as the game's own workers (see Worker fields). In a pack:

• name must be unique in the whole game. Events find the character by this exact name.
• folder is the image folder name: letters, numbers, _ and -.
• gender is female or male. nsfw missing counts as true.
• "unique": true, "encounter_only": true make a named character met through recruitment rather than sold at the market.
• Every trait listed must exist in the game or in the pack.
• Other fields (for example image_folder) are dropped with a warning. Procedural, monster and template workers can't be imported.

Image names that match no slot, such as ComfyUI_temp_00001_.png, are never shown. Rename them or leave them out.

Traits

A JSON list in data/traits/, with the fields described in Trait fields. Every name must be new: a trait with a name the game already uses would silently replace the original, so the importer rejects it.

• "only_assigned": true keeps a trait for your character and your events. Without it, random recruits can roll it.
• A race trait lists the other races, Human included, in conflicts.
• Put the effect in the description so players see it: [+5 Agility, +3 Clever].

[
  { "name": "Starborn", "only_assigned": true,
    "description": "Guided by the stars. [+5 Agility, +3 Clever]",
    "modifiers": { "skill_modifiers": { "Agility": 5, "Clever": 3 } } }
]

Recruitment scene

A JSON list in data/events/recruit/. It plays when the player recruits and your character is available.

• "worker_name": "Mira" and "random_worker": false tie the scene to your character.
• The hiring choice uses "effect": {"recruit_worker": true}. The text can use [event_worker], [COST] and [actual_cost].
• The id must be new. By convention it starts with event_recruit_.

Story events

A JSON list in data/events/: quests, rivalries, promotions that happen during the day.

{
  "id": "mira_trailblazer_trial",
  "worker_name": "Mira",
  "worker_selection": "random",
  "building_type": ["adventurers_guild"],
  "max_occurrences": 1,
  "conditions": { "start_when": "has_worker:Mira" },
  "excluded_flags": { "mira_trailblazer_done": true },
  "choices": [{
    "option": "Send Mira to chart the passes.",
    "condition": "Agility", "threshold": 50,
    "message_success": "…", "message_failure": "…",
    "effect": {
      "success": { "add_trait": "Trailblazer", "event_flags": { "mira_trailblazer_done": true } },
      "failure": { "event_flags": { "mira_trailblazer_done": true } }
    }
  }]
}

• One skill check per choice: condition and threshold appear once. Writing them twice in the same choice is invalid JSON for the importer ("a key written twice").
• required_traits with "trait_visibility": "blocked" and a blocked_message shows a choice the player can't pick yet.
• Event ids here must not start with event_recruit_: the game drops those from the daily pool.

Several skills, or no roll at all

A choice can ask for more than one skill with skill_requirements. Only workers who meet every minimum can take the choice; when nobody does, the option is shown locked with the reason. A player can never burn the event on a worker who doesn't qualify.

{
  "option": "Send someone who can fight and climb.",
  "skill_requirements": { "Combat": 70, "Agility": 55 },
  "message_success": "[acting_worker] clears the pass without a scratch.",
  "effect": { "money": 500, "add_trait": "Trailblazer" }
}

• The option shows "(guaranteed, requires Combat 70, Agility 55)", and the worker list shows each worker's levels.
• Levels count traits and equipment, the same way as skill rolls.
• The effect can be flat, or split into success/failure: a guaranteed choice applies success.
• Needs a worker: not with "worker_selection": "none", not with building_skill, and not in recruitment scenes. NSFW skills (Sex, Oral…) need "nsfw": true on the event or the choice.

Needs a game version newer than 0.9.6.2t1.

Chains and conditions

Event 1 sets a flag with event_flags. Event 2 starts with "start_when": "has_flag:mira_trailblazer_done" and excludes its own "done" flag, and so on.

Waiting a number of days: event 1 sets "event_flags": {"mira_day": "[calculate_total_days()]"}, which stores today's day. Event 2 uses "start_when": "after_days_from_flag:mira_day,7".

start_when and stop_when accept these, joined with AND or OR :

Daily stories

Extra stories for an existing job, in data/buildings/daily_story_extensions/. They are added to the job's stories and never replace them. The story fields are the same as the game's (see Daily story fields); the image names follow the Images rules.

{ "daily_story_extensions": [{
    "building_id": "adventurers_guild",
    "profession_id": "adventurer",
    "merge_mode": "append",
    "daily_stories": [ { "id": "mira_trailblazer_route", "report": "Route Charting", … } ]
}] }

• merge_mode must be append (missing counts as append).
• report is the title in the Daily Report: short, about 24 characters, with no {worker_name}.
• To keep a story for your character, use required_traits with one of your only_assigned traits. worker_name has no effect on daily stories.
• Every story id must be new.

Buildings and jobs you can target

What the importer checks

Before installing, the importer refuses a pack, and says why, when:

• a file is not valid JSON, or repeats a key inside the same object;
• a trait, event id or story id already exists in the game or in another installed pack;
• a daily story targets a building or job that doesn't exist, or doesn't use append;
• a condition or flag value is something the game would run as code;
• skill_requirements names an unknown skill, is used where no worker acts, or tests an NSFW skill in an event not marked NSFW;
• a character has no profile image, or a field has an invalid value.

When a character's name is taken, the player can install it as "Name (Mod xxxxxx)". The importer then updates worker_name, has_worker:, has_folder_worker: and specific_worker_images in the pack's own events, so they keep working.

Common mistakes

JSON overrides

An override replaces a whole game data file, found by its exact path (for example data/items/items.json), with your edited copy. Use it for balance and rule changes that a character pack can't make.

• The whole file is replaced: entries you leave out are gone, not inherited.
• Install with Mods > Install mods and "Import as JSON override" ticked, restart, then start a new game. When two overrides change the same file, the last one installed wins.
• Never copy an override into the game folder by hand.