Duodeca RPG System - Revision history

Asapphesteron at 06:51, 9 April 2026

2026-04-09T06:51:49Z

← Older revision		Revision as of 23:51, 8 April 2026
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	== Basic mechanics ==		== Basic mechanics ==
	Duodeca is named for its primary dice mechanic, 2d12. The vast majority of rolls are permutations thereof. 2d12 strikes a balance between the classic 1d20, with a flat curve of probability (all 5% likely) which thus tends to be 'swingy,' and 3d6 which is more heavily curved.		Duodeca is named for its primary dice mechanic, 2d12. The vast majority of rolls are permutations thereof. 2d12 strikes a balance between the classic 1d20, with a flat curve of probability (all 5% likely) which thus tends to be 'swingy,' and 3d6 which is more heavily curved. Under certain circumstances advantaged or disadvantaged rolls are made, these are 3d12 but taking only the highest pair or lowest pair of dice.

	Characters are built of attributes (Strength, Agility, Endurance, Intelligence, Perception, and Charisma) and skills rather than classes. This is to encourage characters existing as distinct individuals rather than fill-in-the-blank archetypes. The choice of attributes is derived from the ''Fallout'' games but minus Luck due to it operating on a more metaphysical level rather than illustrating the tangible capabilities of a character.		Characters are built of attributes (Strength, Agility, Endurance, Intelligence, Perception, and Charisma) and skills rather than classes. This is to encourage characters existing as distinct individuals rather than fill-in-the-blank archetypes. The choice of attributes is derived from the ''Fallout'' games but minus Luck due to it operating on a more metaphysical level rather than illustrating the tangible capabilities of a character.
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	== Levelling up ==		== Levelling up ==

			== Statistics ==
			The average result of a 2d12 roll is 13. With advantage the average is 16 and with disadvantage 10.

			The theoretical maximum skill bonus one can reach is +27, and the maximum roll is 51.

			The theoretical maximum health/morale at Level 12 is 97, and the minimum is 31.

Asapphesteron: Added encumbrance rules.

2026-03-13T20:08:56Z

Added encumbrance rules.

← Older revision		Revision as of 13:08, 13 March 2026
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	=== Chems and addiction ===		=== Chems and addiction ===

			=== Carry weight and encumbrance ===
			A character can carry up to 30 + 5(STR) lbs without difficulty. Past this threshold they enter light encumbrance, where movement requires two actions to move the distance of one. Heavy encumbrance begins past 1.5(30 + 5(STR)) lbs, whereupon movement requires three actions to move the distance of one. It is impossible to carry more than 2(30 +5 (STR)) lbs.

	== Levelling up ==		== Levelling up ==

Asapphesteron at 08:42, 13 March 2026

2026-03-13T08:42:08Z

← Older revision		Revision as of 01:42, 13 March 2026
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	Duodeca is named for its primary dice mechanic, 2d12. The vast majority of rolls are permutations thereof. 2d12 strikes a balance between the classic 1d20, with a flat curve of probability (all 5% likely) which thus tends to be 'swingy,' and 3d6 which is more heavily curved.		Duodeca is named for its primary dice mechanic, 2d12. The vast majority of rolls are permutations thereof. 2d12 strikes a balance between the classic 1d20, with a flat curve of probability (all 5% likely) which thus tends to be 'swingy,' and 3d6 which is more heavily curved.

	Characters are built of attributes (Strength, ~~Perception~~, Endurance, ~~Charisma~~, ~~Intelligence~~, and ~~Agility~~) and skills rather than classes. This is to encourage characters existing as distinct individuals rather than fill-in-the-blank archetypes. The choice of attributes is derived from the ''Fallout'' games but minus Luck due to it operating on a more metaphysical level rather than illustrating the tangible capabilities of a character.		Characters are built of attributes (Strength, Agility, Endurance, Intelligence, Perception, and Charisma) and skills rather than classes. This is to encourage characters existing as distinct individuals rather than fill-in-the-blank archetypes. The choice of attributes is derived from the ''Fallout'' games but minus Luck due to it operating on a more metaphysical level rather than illustrating the tangible capabilities of a character.

	Duodeca uses a level system (1 to 12) for character progression.		Duodeca uses a level system (1 to 12) for character progression.
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	Attributes range from 1 to 12. To create a character, begin by assigning them their attribute scores using a pool of 36 points.		Attributes range from 1 to 12. To create a character, begin by assigning them their attribute scores using a pool of 36 points.

	Characters have 12 + INT skill points at first level, then 4 ~~+ INTmod~~ each subsequent level.		Characters have 12 + INT skill points at first level, then 4 each subsequent level.

	Characters have 1 perk at first level, then 1 perk each subsequent even-numbered level.		Characters have 1 perk at first level, then 1 perk each subsequent even-numbered level.
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	=== Radiation ===		=== Radiation ===

			=== Chems and addiction ===

	== Levelling up ==		== Levelling up ==

Asapphesteron at 03:01, 15 February 2026

2026-02-15T03:01:09Z

← Older revision		Revision as of 20:01, 14 February 2026
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	Characters have 1 perk at first level, then 1 perk each subsequent even-numbered level.		Characters have 1 perk at first level, then 1 perk each subsequent even-numbered level.

	Characters have 6 + END ~~+ ENDmod~~ health points at first level, then 3 + ENDmod health points each subsequent level.		Characters have 8 + END health points at first level, then 4 + ENDmod health points each subsequent level.

	Characters have 6 + CHA ~~+ CHAmod~~ morale points at first level, then 3 + CHAmod morale points each subsequent level.		Characters have 8 + CHA morale points at first level, then 4 + CHAmod morale points each subsequent level.

	== Skills ==		== Skills ==
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	=== Armor class, damage threshold, and cover ===		=== Armor class, damage threshold, and cover ===
	A character's armor class is 12 + AGLmod + PERmod at base. Armor can increase it, as well as taking cover in combat.		A character's armor class is 16 + AGLmod + PERmod at base. Armor can increase it, as well as taking cover in combat.

	=== Damage, demoralization, and death ===		=== Damage, demoralization, and death ===

Asapphesteron: Continued filling in sections, particularly character creation and recovery.

2026-02-10T18:35:20Z

Continued filling in sections, particularly character creation and recovery.

← Older revision		Revision as of 11:35, 10 February 2026
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	Characters are built of attributes (Strength, Perception, Endurance, Charisma, Intelligence, and Agility) and skills rather than classes. This is to encourage characters existing as distinct individuals rather than fill-in-the-blank archetypes. The choice of attributes is derived from the ''Fallout'' games but minus Luck due to it operating on a more metaphysical level rather than illustrating the tangible capabilities of a character.		Characters are built of attributes (Strength, Perception, Endurance, Charisma, Intelligence, and Agility) and skills rather than classes. This is to encourage characters existing as distinct individuals rather than fill-in-the-blank archetypes. The choice of attributes is derived from the ''Fallout'' games but minus Luck due to it operating on a more metaphysical level rather than illustrating the tangible capabilities of a character.

			Duodeca uses a level system (1 to 12) for character progression.

	== Character creation ==		== Character creation ==
			Attributes range from 1 to 12. To create a character, begin by assigning them their attribute scores using a pool of 36 points.

			Characters have 12 + INT skill points at first level, then 4 + INTmod each subsequent level.

			Characters have 1 perk at first level, then 1 perk each subsequent even-numbered level.

			Characters have 6 + END + ENDmod health points at first level, then 3 + ENDmod health points each subsequent level.

			Characters have 6 + CHA + CHAmod morale points at first level, then 3 + CHAmod morale points each subsequent level.

	== Skills ==		== Skills ==
			Skills range from 0 ranks to 24 at maximum.

	== Perks ==		== Perks ==
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	=== Armor class, damage threshold, and cover ===		=== Armor class, damage threshold, and cover ===
			A character's armor class is 12 + AGLmod + PERmod at base. Armor can increase it, as well as taking cover in combat.

	=== Damage, demoralization, and death ===		=== Damage, demoralization, and death ===
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	=== Recovering health and morale ===		=== Recovering health and morale ===
			Health points can only be regenerated by healing items, medical attention using the Medicine skill, or extended downtime. Morale points can only be regenerated by resting. Thus a stimpak restores health but not morale while a short rest restores morale but not health.

	=== Radiation ===		=== Radiation ===

			== Levelling up ==

Asapphesteron at 08:06, 10 February 2026

2026-02-10T08:06:16Z

← Older revision		Revision as of 01:06, 10 February 2026
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	== Miscellaneous mechanics ==		== Miscellaneous mechanics ==

			=== Recovering health and morale ===

	=== Radiation ===		=== Radiation ===

Asapphesteron at 08:05, 10 February 2026

2026-02-10T08:05:30Z

← Older revision		Revision as of 01:05, 10 February 2026
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	=== Damage, demoralization, and death ===		=== Damage, demoralization, and death ===

			== Miscellaneous mechanics ==

			=== Radiation ===

Asapphesteron at 07:59, 10 February 2026

2026-02-10T07:59:59Z

← Older revision		Revision as of 00:59, 10 February 2026
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	Combat initiates with rolls from all participants to determine turn order, called the initiative roll. This is 2d12 + PERmod; any ties are resolved by who has the higher PER. Participants who enter the combat later roll initiative and slot into the turn order based on that.		Combat initiates with rolls from all participants to determine turn order, called the initiative roll. This is 2d12 + PERmod; any ties are resolved by who has the higher PER. Participants who enter the combat later roll initiative and slot into the turn order based on that.

	=== Actions ===		=== Actions and reactions ===
	Every character can perform three actions per turn.		Every character can perform three actions and one reaction per round. Actions can only be performed in that character's turn in a round, reactions can only be performed during another's.

	=== Movement ===		=== Movement ===

Asapphesteron: Created subsections to begin fleshing out tactical play rules.

2026-02-10T07:53:10Z

Created subsections to begin fleshing out tactical play rules.

← Older revision		Revision as of 00:53, 10 February 2026
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	== Perks ==		== Perks ==

	== Combat ~~mechanics~~ ==		== Tactical play ==

			=== Initiative and turn order ===
			Combat initiates with rolls from all participants to determine turn order, called the initiative roll. This is 2d12 + PERmod; any ties are resolved by who has the higher PER. Participants who enter the combat later roll initiative and slot into the turn order based on that.

			=== Actions ===
			Every character can perform three actions per turn.

			=== Movement ===

			=== Attacks ===

			=== Armor class, damage threshold, and cover ===

			=== Damage, demoralization, and death ===

Asapphesteron at 03:38, 8 February 2026

2026-02-08T03:38:03Z

← Older revision		Revision as of 20:38, 7 February 2026
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	== Character creation ==		== Character creation ==

			== Skills ==

			== Perks ==

	== Combat mechanics ==		== Combat mechanics ==