Big List of Dice Systems

• Roll below a statistic.
  • Single target.
    • d20 vs Stat-: The Black Hack, D&D/AD&D (ability check)
    • d100 vs Stat-: Basic Roleplaying, Call of Cthulhu, Eclipse Phase
    • With single dice values significant:
      • Xd6kn1 vs Stat special 6; Costume Fairy ADventures
  • Multiple target.
    • d100 vs Stats-: Unknown Armies 1st and 2nd
• Roll total over a target number(s).
  • Single target number.
    • d6+ vs VTN: Ancient Odysseys, Kill Puppies for Satan
    • d6*X vs VTN: Maid
    • Xd6+d6x+ vs VTN: Open d6
    • d12+ vs VTN: Cartoon Action Hour
    • 2d12+ vs VTN: Colonial Gothic
    • d20 vs VTN: Cypher Systems (Numenera, The Strange)
    • d20+ vs VTN: d20 System (Dungeons & Dragons 3rd/4th, Pathfinder, etc..), Archmage Engine (13th Age), D&D/AD&D (saving throw), Godbound
    • d20+ / 2d20kh1+ / 2d20kl1+ vs VTN: Dungeons & Dragons 5th.
    • d20+ / d20+Xd6kh1 / d20-Xd6kh1 vs VTN: Shadow of the Demon Lord
    • 4dF+ vs VTN: FATE (Fate Core, Dresden Files, Spirit of the Century..)
    • Xd10xkhY vs VTN: AEG (Legend of the 5 Rings, 7th Sea 1st)
    • 2dXxkh1+ vs FTN: Savage Worlds
    • Xd6xkh1-d6x+ vs VTN: CORPS, Nexus The Infinite City, Feng Shui
    • Xd6 / Yd6khX / Yd6klX vs VTN: Over The Edge 1st and 2nd
    • Xd6kh1 vs Xd6kh1, kh more on ties: Sorcerer
    • XdYkh2 vs ZdAkh2: Cortex System
    • With single dice values significant:
      • 2d6 / Xd6kh2 / Xd6kl2 vs FTN special 3/4: Over the Edge 3rd
      • 3d6+ vs VTN special 6: Fragged (Fragged Empire, Kingdom, Seas..)
      • 3d6+ vs VTN special doubles: Dragon Age
      • 3dX+3dY+1dZ vs FTN special 4: Overlight
      • Xd10kh1+ vs VTN: Double Cross
  • Multiple target thresholds.
    • d6 / 2d6kh1 / 2d6kl1 vs VTNs: Strike!
    • 2d6+ vs FTNs: Powered By The Apocalypse (Apocalypse World, Dungeon World, etc.)
    • 2d6+ / 3d6kh2+ / 3d6kl2+ vs FTNs: PbtA with advantage/disadvantage (Legacy)
    • Xd6kh1 vs FTNs: Forged In The Dark (Blades In The Dark, Scum & Villainy, etc.)
    • Xd10kh1 vs FTNs: Spire

• Roll and count dice meeting a criterion.
  • Single dice pool.
    • Xd6 >= 5+- vs VTN: Shadowrun, Tiny d6 (Tiny Dungeon, Frontier..)
    • Xd10 >= 7+- vs VTN: Old World of Darkness (Vampire, Werewolf, Mage, etc..)
    • Xd20 >= 15+- vs VTN: Eoris Essence
    • With single dice values significant:
      • Xd6 >= 5+- vs VTN special 1: Paranoia Red Clearance/White Box
  • Multiple significant dice pools.
    • Xd6+Yd6+Zd6 == 6: Modiphius (Forbidden Lands, Mutant Year Zero..)
    • Xd6+Yd6+Zd6 <= 3 vs Ad6 <= 3: Don't Rest Your Head
  • Custom dice.
    • Xdc12 + Xcd8 + Xcd6 vs Xcd12 + Xcd8 + Xcd6 == syms: Genesys (FFG Star Wars, Warhammer)

• Roll and count sets of dice meeting a criterion.
  • Xd10 form sets totalling 10+: 13th Age Second Edition
  • Xd10 form matching sets: One Roll Engine (Godlike, Wild Talents, Reign)

• Other.
  • Card based.
    • Draw tarot <= VTN: Fugue (Alas Vegas)
  • Other-other.
    • Form chain from X dominoes: Noumenon.
    • Pull X Jenga pieces: Dread.
    • Beat the GM at physical exercise: LIFTS.

Reading Dice Specifications

"d" indicates a dice roll, with the number of dice and the number of faces either side. 2d6 means 2 six-sided dice.

"dF" means a FATE dice, with two blank sides, two "-1" sides and two "+1" sides.

"x" after a dice roll means an explosive dice roll, where the dice is rerolled and added if it rolls maximum.

"cd" indicates a roll of custom dice with the given number of dice and faces. The result of custom dice is normally not a number.

"kh" after a dice roll indicates keep the highest given number of dice. For example, 3d6kh1 means "roll 3 six-sided dice and keep the highest 1". "kl" indicates "keep lowest". "kn" indicates "keep nearest" - keep the highest value that is below a given maximum.

"+" between dice specifications means the results are added together. "+" after a dice specification means static values are added to or subtracted from the result.

X, Y, Z, A... all mean values calculated within the rules system. Xd6 means a variable calculated number of d6. dX means one dice of a variable calculated type.

FTN and VTN mean Fixed, and Variable, Target Number.