Welcome to the Generic Universal RolePlaying System!
With GURPS, you can be anyone you want – an elf hero fighting for the forces of good, a shadowy femme fatale on a deep-cover mission, a futuristic swashbuckler carving up foes with a force sword in his hand and a beautiful woman by his side . . . or literally anything else! Thanks to its flexibility, quality writing, and ease of use, GURPS has been the premiere universal roleplaying game for over three decades!
Rules Generic Enough to Handle One Piece [ edit ]
GURPS, from Steve Jackson Games, stands for Generic Universal Role-Playing System, and the game does exactly what's on the tin: it let's you use a single set of rules to play any sort of campaign you could want, from space travel, to super heroes, to the world of One Piece.
GURPS was created in 1986, is now in its fourth edition, and takes a very different from many other generic systems when it comes to handling the variety of powers seen in anime. While systems like Fate or KAIZOKU! use basic/abstract rules, that can work with any character, GURPS instead offers rules for just about anything.
From Fishmen, to Haki powers, to devil fruit-based rubber-like bodies, just about everything in One Piece can be simulated using GURPS rules. The game offers both a detailed point-based character creation system, and a similarly detailed ("crunchy") set of rules. Together this combination makes GURPS perfect fans who prefer "simulationist"-style games over narrative-focused ones.
GURPS, 4th Edition - Rules SummaryCollapse
Character Creation [ edit ]
Character creation in GURPS is detailed, but slow. There are no levels or classes, just points, which can be used to buy attributes, advantages, disadvantages, or skills. Different campaigns start with different amounts of points, so that (for instance) a superhero can start out as a more powerful character.
GURPS has four attributes: Strength, Dexterity, Intelligence and Health. Strenght and Healthy just define the character physically, while Intelligence and Dexterity are combined with skills to make skill checks.
Skills are how characters accomplish things in GURPS; for instance to shoot someone you would use the "Guns" skill. Skills are based on attributes, so for instance you might buy the Guns skill at a "Dex + 1" level. If you later improved your Dexterity, you'd similar improve your ability to shoot ... or do anything else physical.
Advantages cover any non-skill benefit a character might have, such as a high pain threshold, wizard training, or the ability to move objects with their mind. Advantages can also be further be customized with enhancements or limitations, allowing you to gain more or less powerful versions, that cost more or less points as a result. This can allow for a nearly any power you can imagine to be described as a GURPS advantage.
Similarly players can also take disadvantages for their character, such as Code of Honor or Blind, to gain extra points. All together this system allows for incredibly individualized character, including almost any you'd want to re-create from fiction or real-life (in fact, there are multiple GURPS books with stats for historical NPCs such as Ghengis Khan) ... but it can be a bit overwhelming to newcomers.
Core Mechanics [ edit ]
To succeed at an action in GURPS, players roll 3d6 and attempt to rull under a target number, which varies depending on the action. Most of the time the actio will be a "skill check", meaning the player will have to rul equal to or less than the character's relevant skill.
Critical Successes and Failures
If you fail a roll by more than 10 you critically fail the roll, and the GM decides what terrible fate results. Similarly if you beat the roll by more than 10 you instead get a critical success, dealing extra damage or otherwise succeeding with flair.
A Note About 3d6 (vs. d20 or Other Dice)
3d6 results in a far more predictable distribution of rolls than a single die roll (typical in other systems). Think about when you roll stats for a Dungeons and Dragons character: you usually get a lot of more 10's and 11s than 3's and 18's. In contrast, every d20 roll has an equal (5%) chance of rolling a 1 or 20 as it does a 10 or 11.
This allows GURPS to have critical successes and failures, but have them be rarer and more dramatic, while leaving most rolls with fairly predictable/average outcomes.
Combat [ edit ]
GURPS uses a hexagonal grid for combat. Hexes offers a benefit vs. square grids, when it comes to diagonal movemen: in square grid games (eg. D&D) characters moving diagonally move more quickly ... but since hexes don't have corners, they don't have this problem.
Unlike most games, GURPS does not have a random element to initiative. Instead, characters always move in order based on their basic speed (a stat derived from their Dexterity and Health scores).
If one group surprises the other they can potentially get several seconds of actions before their opponent can react ... and since a single round of combat in GURPS lasts a second, that can be significant.
On their (one second) turn a a character can take a single maneuver, plus any number of free actions (eg. talk or drop an item). A maneuver could be to move, attack, or move and attack (at a penalty), as well as other options such as aiming or feinting. A character who moves can move a number of yards equal to their basic move (ie. basic speed with fractions rounded off).
To attack a character makes a skill check with the appropriate weapon skill, applying a variety of modifiers for things like the target's size, range, and speed, or the weapon's accuracy bonus (if they took the time to aim), the lighting conditions, any cover the target has, etc.
If the check succeeds the target can then opt to make an "active defense". There are three options: Dodge, Block (eg. with a shield) and Parry (with a weapon), and ranged attacks can only be dodged. Active defenses are also a skill check, for Block and Parry; to Dodge you simply roll your Basic Move + 3.
If the active defense roll succeeds, the attack misses.
If an attack roll succeeds the attacker gets to make a damage roll, which will vary based on the weapon they use and other factors (eg. ranged weapons do half their damage when far enough away from a target). If the defender is wearing any armor they can subtract it's "DR" (damage resistance) from the damage, and the rest goes through.
Depending on the type of damage dealt, it might be multiplied now (eg. cutting weapons deal 1.5x ).
A Great But Crunchy Option [ edit ]
A great starting point for anyone considering a One Piece GURPS campaign is this series of posts on Roleplay Online. On that site user "D." has re-created the entire Straw Hat Pirate crew, plus he's also created the various races from the show, and rules for Haki and fish karate.
Of course, a GM will still have to do their own conversions to use anything else from the rest of the show, but that link should help demonstrate how easy it is to make such conversions, once you're familiar with GURPS rules.
But is it Any Good?
GURPS has two core books, and Amazon gave 4.6 stars, or better. Similarly, Drive Thru RPG gave the two books 4.7 and 4.9 stars. Good Reads gave both books about 4 / 5. and finally RPG Geek (the most critical of the sources) still gave it a fairly strong 7.6 / 10.
In short, with GURPS you get a well-evolved edition of a long-popular RPG. Its powerful and generic system is great for a simulationist fan wanting to run a One Piece campaign ... but not so great if you want a faster-paced, narrative focus.