GURPS 4E Core Ruleset

[ronnke]

This unofficial GURPS Ruleset for Fantasy Grounds is developed with the permission of Steve Jackson Games.

Latest Release Downloads

GURPS 4E Core Ruleset - FG Unity (FG Unity only)
FG Forge shop (FG Unity users only): FG Forge Shop
(Updated: 10th May 2026)

GURPS 4E Core Ruleset - FG Classic (FG Classic only. The ruleset for FG Classic is no longer being updated)
Download latest release from here: https://bit.ly/GURPS4ECore
(Updated: 14th Mar 2022)

* Here is a video demonstrating some of the features of the GURPS ruleset (it will be updated some day): https://youtu.be/pSm-9Trzd5w

GURPS Core Theme for Unity (No longer being updated)
Download the latest release of the GURPS Core theme from here: https://bit.ly/GURPSCoreUTheme
(Updated: 18th Aug 2024)
(Courtesy of Gigermann)

GCA Exporter Files
Download the GCA exporter files from here: https://bit.ly/GCAtoFGExport
(Updated: 21st Aug 2018)
(Courtesy of Andraax)

GURPS No Dice Extension
Download an extension to remove non-GURPS dice from the Fantasy Grounds desktop: https://bit.ly/GURPSNoDiceExt
(Updated: 22nd Oct 2022)
(Courtesy of Ronnke)

* A video tutorial demonstrating the process of exporting and importing characters from GCA5: https://youtu.be/rlKlGlSvayw
* A video tutorial demonstrating the process of exporting and importing characters from GCA4: https://youtu.be/CHn7jkM0UFQ
* A video tutorial demonstrating the process of exporting and importing characters from GCS: https://youtu.be/atTstjdU2_A

Please report any bugs, errors.

You can export and import (player characters only) from the previous ruleset. You can also import PCs/NPCs using the currently available GCA export to FG created by Saithan.

One feature which is not obviously clear, you can drag and drop Skills onto the attributes at the top of the skills section. This will perform an attribute based skill role using the skill's relative levels. eg To do an IQ based, Guns roll, to un-jam a rifle, simply drag and drop the appropriate skill onto the IQ box.

Enjoy.

Suggest New Ideas and Features

Click the following link to have your input on future ruleset development/improvement: http://gurps4efg.idea.informer.com/proj/

Version Information

• GURPS 4e Ruleset v3.19.1 - 10th May 2026 (FG Unity Only)
  - Fixed: Breaking changes from FGU update.

• GURPS 4e Ruleset v3.19.0 - 15th Mar 2026 (FG Unity Only)
  - Added: Knockback to damage application helper.
  - Fixed: Issue with damage calculation.
  - Changed: Better parsing of damage syntax.
  - Changed: Sorted custom conditions in alphabetic order.

• GURPS 4e Ruleset v3.18.4 - 23rd Feb 2026 (FG Unity Only)
  - Fixed: Status color in the combat tracker was not updating correctly.

• GURPS 4e Ruleset v3.18.2 - 10th Feb 2026 (FG Unity Only)
  - Fixed: minor bugs.

• GURPS 4e Ruleset v3.18.1 - 9th Feb 2026 (FG Unity Only)
  - Fixed: Bug with dragging abilities to NPC sheet.
  - Changed: Damage application message.

• GURPS 4e Ruleset v3.18.0 - 8th Feb 2026 (FG Unity Only)
  - Changed: Redesigned character sheet.
  - Changed: Redesigned combat section of NPC sheet.
  - Added: Hardened option to Damage application helper.
  - Added: Half Damage button for range weapons.
  - Fixed: Bug with the Range Modifier toggle button in the map toolbar.
  - Other minor fixes and improvements.

• GURPS 4e Ruleset v3.17.0 - 30th Dec 2025 (FG Unity Only)
  - Added: Preset Conditions to Effects window.
  - Added: Conditions and Effects icons to N/PC map tokens.
  - Added: Injury Status Pip to N/PC map tokens.
  - Added: Death Markers feature.
  - Other minor fixes and improvements.

• GURPS 4e Ruleset v3.16.5 - 16th Aug 2025 (FG Unity Only)
  - Fixed: A bug with the damage helper. Default values for Hit Location and Injury Tolerance were not set.

• GURPS 4e Ruleset v3.16.4 - 31th May 2025 (FG Unity Only)
  - Added: Infinite armor divisor for damage application helper.
  - Added: Fatigue damage to the damage application helper.
  - Fixed: A bug with the 3D view token.

• GURPS 4e Ruleset v3.16.3 - 26th May 2025 (FG Unity Only)
  - Fixed: Bug with drag and drop of damage. Some damage results were not being applied.

• GURPS 4e Ruleset v3.16.2 - 26th May 2025 (FG Unity Only)
  - Fixed: Bug with drag and drop of damage. Armor divisor and damage types were not applied.
  - Reworked: Damage application helper to display important information.
  - Added: Minimum damage on damage rolls for damage types.

• GURPS 4e Ruleset v3.16.1 - 25th May 2025 (FG Unity Only)
  - Fixed: Bug with Reaction rolls. Modifiers were not being applied correctly.

• GURPS 4e Ruleset v3.16.0 - 25th May 2025 (FG Unity Only)
  - Fixed: Code compatibility with CoreRPG.
  - Added: Damage application helper in Combat Tracker. Roll damge with a target, or drag and drop damage to a target, to display the helper in the combat tracker.
  - Added: Complex dice expressions/formulas for damage rolls. eg ((2d+1)x3)-(1d/2)+6 cut.
  - Added: Apply Range Modifier option. Enable the option to automatically apply range modifiers on Ranged Attack rolls.
  - Many other minor changes and fixes.

• GURPS 4e Ruleset v3.15.1 - 11th Apr 2025 (FG Unity Only)
  - Fixed: Combat Tracker menu options.
  - Reworked: The House rule option to randomize turn/initiative order. Added more initiative types. Players can roll their own Initiative from a button next to Basic Speed on the Main tab of the character sheet. GM can roll Initiatives from the Combat Tracker menu.
  - Added: House rule option to automatically roll and/or group NPC initiatives when they are added to the combat tracker.

• GURPS 4e Ruleset v3.15.0 - 28th Feb 2025 (FG Unity Only)
  - Added: Holding CTRL while making a dice roll, that roll will be a secret/tower roll.
  - Added: House rule option to randomize turn/initiative order. A d4 or d6 is added to Basic Speed when adding an N/PC to the combat tracker.

• GURPS 4e Ruleset v3.14.0 - 23rd Nov 2024 (FG Unity Only)
  - Changed: Default modifier box size.
  - Changed: Default dice tower icon.
  - Fixed: FG/CoreRPG (Ver 4.6.0) breaking changes.

• GURPS 4e Ruleset v3.13.2 - 24th Aug 2024 (FG Unity Only)
  - Fixed: Spelling error.

• GURPS 4e Ruleset v3.13.1 - 18th Aug 2024 (FG Unity Only)
  - Fixed: FG/CoreRPG (Ver 4.5.10) breaking changes.

• GURPS 4e Ruleset v3.12.0 - 12th Mar 2024 (FG Unity Only)
  - Fixed: Minor FG/CoreRPG (Ver 4.5) breaking changes.
  - Added: Ability to output Traits, Abilities, Items, Vehicles, and Notes to the chat window.
  - Other: Refactored ruleset code bring it inline with FG/CoreRPG changes.

• GURPS 4e Ruleset v3.11.1 - 9th Mar 2024 (FG Unity Only)
  - Fixed: FG/CoreRPG (Ver 4.5) breaking changes.

• GURPS 4e Ruleset v3.10.3 - 19th Nov 2023 (FG Unity Only)
  - Fixed: FG/CoreRPG breaking changes.
  - Fixed: Inventory location equip/unequip.

• GURPS 4e Ruleset v3.10.2 - 19th Jun 2023 (FG Unity Only)
  - Fixed: Formatting issue with effects window.

• GURPS 4e Ruleset v3.10.1 - 15th Jun 2023 (FG Unity Only)
  - Fixed: Script errors following the FG4.4 release.

• GURPS 4e Ruleset v3.10.0 - 11th Mar 2023 (FG Unity Only)
  (This update will make changes to the campaign database. If concerned, backup your campaign folder before applying)
  - Fixed: Several compatability issues with CoreRPG.
  - Fixed: Chat Window default position.
  - Fixed: Skill, Spell ability auto level calculations.
  - Added: Power, Other ability auto level calculations. (Accessible via the "Info/Detail" section icon)

• GURPS 4e Ruleset v3.9.2 - 22nd Oct 2022 (FG Unity Only)
  - Fixed: Client Combat Tracker script error issue.
  - Fixed: Dice placement issue.
  - Fixed: NPC tab order.
  - Added: GURPS No Dice optional extension to the ruleset forge update.

• GURPS 4e Ruleset v3.9.1 - 10th Jun 2022 (FG Unity Only)
  - Fixed: Language script error issue.
  - Added: Toolbar controls to enable/disable range modifiers on map pointers.

• GURPS 4e Ruleset v3.9.0 - 5th Jun 2022 (FG Unity Only)
  - Fixed: 12 point token facing on hex maps.
  - Added: Range modifier to map pointers.
  - Added: RoF changes to handle shotguns. (eg RoF 3x9)

• GURPS 4e Ruleset v3.8.2 - 18th Mar 2022 (FG Unity Only)
  - Fixed: a minor script warning.

• GURPS 4e Ruleset v3.8.1 - 14th Mar 2022 (FG Unity Only)
  - Fixed: issue with languages.

• GURPS 4e Ruleset v3.8.0 - 10th Mar 2022 (FG Unity Only)
  - Fixed: issue with inventory and encumbrance.
  - Other: refactored some code.

[damned]

Im first!
Well done roonke!

[ronnke]

Im first!
Well done roonke!

Well technically second.

[Torg Smith]

WOOTERS!!!!

Thank you for your work. I will be checking it out.

[Keppler]

Thank you Ronnke!

[Trenloe]

45 minutes and no yako2020? He can't have been that anxious for this new ruleset!

Great work ronnke.

[ronnke]

I've already found a bug. Fixing it now.

[damned]

he wont see it because i had posted a reply on his post just a minute or two before ronnke did... Im sure he is not too far away...

[Dakadin]

Thanks Ronnke! I've just done a quick look through and it looks great.

[viresanimi]

This looks quite amazing. I haven't played Gurps in many many years, but now I want to again!

I did run into an error:
Script Error: [string "campaign/scripts/npc_main.lua"]:35: attempt to index global 'traits' (a nil value)

That was just by making, locking / unlocking an npc. Might be due to the fact that I run the test version. Just wanted give a heads up on this.


Great work sir!


Vires Animi