3d20 system
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The 3d20 system is the
role-playing game system A role-playing game system is a set of game mechanics used in a tabletop role-playing game (TTRPG) to determine the outcome of a character's in-game actions. History By the late 1970s, the Chaosium staff realized that Steve Perrin's ''RuneQuest' ...
used in '' Neuroshima'' and ''
Monastyr ''Monastyr'' is a Polish role-playing game published in 2004. It is set in a dark fantasy world of Dominium. Its setting features a fantastic equivalent of the Age of Enlightenment. Most often, the game plots are cloak and dagger-like and invo ...
''. Like the d20 System, it uses twenty-sided dice, but unlike that system it most typically uses three.


Core mechanic

#name the skill to be tested and the difficulty level #roll three twenty sided dice #compare all three separate results with the given
attribute Attribute may refer to: * Attribute (philosophy), an extrinsic property of an object * Attribute (research), a characteristic of an object * Grammatical modifier, in natural languages * Attribute (computing), a specification that defines a prope ...
#if at least two of the three results are lower than the attribute modified by the difficulty level, test is successful.


Details

When a test is required, the
Gamemaster A gamemaster (GM; also known as game master, game manager, game moderator, referee, or storyteller) is a person who acts as an organizer, officiant for regarding rules, arbitrator, and moderator for a multiplayer role-playing game. They are m ...
, names the
skill A skill is the learned ability to act with determined results with good execution often within a given amount of time, energy, or both. Skills can often be divided into domain-general and domain-specific skills. For example, in the domain of w ...
which is going to be tested (or a raw
attribute Attribute may refer to: * Attribute (philosophy), an extrinsic property of an object * Attribute (research), a characteristic of an object * Grammatical modifier, in natural languages * Attribute (computing), a specification that defines a prope ...
, if no skill is available for the activity the
character Character or Characters may refer to: Arts, entertainment, and media Literature * ''Character'' (novel), a 1936 Dutch novel by Ferdinand Bordewijk * ''Characters'' (Theophrastus), a classical Greek set of character sketches attributed to The ...
is trying to perform). He also sets a difficulty level for the test, which modifies the attribute value (reducing or improving it). Then, the character's skill level is taken into account - if the character does not have any skill levels in the given skill, (in case of Neuroshima) the difficulty level is raised by one, or (in case of
Monastyr ''Monastyr'' is a Polish role-playing game published in 2004. It is set in a dark fantasy world of Dominium. Its setting features a fantastic equivalent of the Age of Enlightenment. Most often, the game plots are cloak and dagger-like and invo ...
), all the three rolls (not two) have to be lower than the tested attribute. Otherwise, the player can subtract a total of his character's skill levels in that skill from any of the three dice rolls, each separately.


Difficulty levels


Special rules

*Suwak ("Slider") is a special rule of this game system. It says that when a character has at least four 4 levels in a skill, each time that skill is tested, the difficulty level is automatically lowered by one; if their skill level is 8 or 12, then difficulty is lowered by two or three levels respectively. It's supposed to depict the fact that the more trained a character becomes, the easier those things they trained seem to them. *Lucky 1 - each time when making a test roll a player rolls "1" on any dice, he is lucky and manages to perform easily; in the terms of mechanics, the test is treated as if the difficulty level was lower by one. ''Notice:'' if the player rolls two "1's", the test is automatically successful. {{RPG systems Role-playing game systems