Big List of Dice Systems

• Roll below a statistic.
  • Single target.
    • 2d6 vs Stat-: Toon
    • 3d6 vs Stat-: HERO System, GURPS, Tri-Stat (Big Eyes Small Mouth, Silver Age Sentinels..)
    • d12 vs Stat-: Abandon All Hope
    • d20 vs Stat-: The Black Hack, D&D/AD&D (ability check), Paranoia XP/Troubleshooters
    • d100 vs Stat-: Basic Roleplaying, Call of Cthulhu, Eclipse Phase, D&D/AD&D (skill / thief ability check), Hackmaster (skill check), Legend
  • Multiple target.
    • d100 vs Stats-: Unknown Armies

• Roll total over a target number(s).
  • Single target number.
    • d6 vs VTN: No Thank You, Evil (Simplified Cypher)
    • d6+?{Mod} vs FTN: Adventure Fantasy Game
    • d6+?{Mod} vs VTN: Ancient Odysseys, Kill Puppies for Satan, Gumshoe (Esoterrorists, Bubblegumshoe..)
    • d6*?{Skill} vs VTN: Maid
    • (d6+?{Mod})-(d6+?{Enemy}): Perfect
    • 2d6+?{Mod} vs VTN: Traveller, Meikyu Kingdom, Stars Without Number
    • ?{Mod}d6 vs VTN: WOIN, Judge Dredd (Worlds of 2000ad), Thirty, Song of Ice And Fire
    • (?{Mod}-1)d6+d6! vs VTN: Open d6
    • (?{Skill}+?{Bonus})d6kh?{Skill} or (?{Skill}+?{Penalty})d6kl?{Skill} vs VTN: Over The Edge 1st and 2nd
    • ?{Stat}d6kh1 vs FTN: OcTane
    • ?{Mod}d6!kh1 vs VTN: Empire of Satanis, Brave New World
    • ?{Mod}d6kh1 vs ?{Enemy}d6kh1, kh more on ties: Sorcerer
    • ((1+?{Fortune|0})d6!kh1-d6!+?{Skill}) vs VTN: CORPS, Nexus The Infinite City, Feng Shui
    • d10+?{Mod} vs VTN: Unisystem (All Flesh Must Be Eaten)
    • d10cf10cs1+?{Mod} vs VTN: Ars Magica
    • d10+?{Mod} vs d10+?{Enemy}: Red Markets
    • d10!+?{Mod} vs VTN: Rune
    • 2d10+?{Mod} vs VTN: SLA Industries, Unity
    • d10*d10 vs VTN: Cyborg Commando
    • ?{Level}d10kh1+?{Mod} vs VTN: Wolsung
    • ?{Stat}d10!kh?{Skill} vs VTN: AEG (Legend of the 5 Rings, 7th Sea 1st)
    • d12+?{Mod} vs VTN: Cartoon Action Hour, Seven Leagues
    • d12!+?{Mod} vs VTN: Metal World
    • 2d12+?{Mod} vs VTN: Colonial Gothic
    • d20 vs VTN: Cypher Systems (Numenera, The Strange)
    • d20+?{Mod} vs VTN: d20 System (Dungeons & Dragons 3rd/4th, Pathfinder, etc..), Archmage Engine (13th Age), RIFTS, D&D/AD&D (saving throw), Godbound, Adventurer Conqueror King
    • d20+?{Mod} vs FTN: Knave
    • d20+?{Mod} vs FTNs: Talislanta
    • (1+?{Advantage|0})d20kh1cs20cf1+?{Mod} or (1+?{Disadvantage|0})d20klcs20cf1+?{Mod} vs VTN: Dungeons & Dragons 5th
    • d20+?{Boons}d6kh1-?{Banes}d6kh1+?{Mod} vs VTN: Shadow of the Demon Lord
    • d100+?{Mod} vs VTN: Synnibarr 3rd
    • d100!>90cf<3 vs VTN: Anima Beyond Fantasy
    • 4dF+?{Mod} vs VTN: FATE (Fate Core, Dresden Files, Spirit of the Century..)
    • d?{Mod}cf1 vs VTN: Albedo
    • d?{Mod}! vs VTN: Kids on Bikes
    • {d?{Mod1},d?{Mod2}}kh1 vs VTN: Agon
    • ?{Mod1}d?{Mod2}!kh1 vs VTN: Spellbound Kingdoms
    • 2d?{Mod}!kh1+?{Mod2} vs FTN: Savage Worlds
    • XdYkh2 vs ZdAkh2: Cortex System, Firefly, Marvel Heroic
    • With single dice values significant:
      • ?{Mod1}d4cs4-${Enemy}d4cf4: My Life With Master
      • 2d6kh2cs4cf3 with possible rerolls: Over the Edge 3rd
      • 3d6cs6+?{Mod} vs VTN: Fragged (Fragged Empire, Kingdom, Seas..)
      • 3d6m+?{Mod} vs VTN special doubles: Dragon Age
      • ?{Mod}d6m vs VTN special: OVA, Whispering Vault
      • 3d?{Mod1}+3d?{Mod2}+1d?{Mod3}cs4 vs FTN: Overlight
      • ?{Mod1}d10kh1+?{Mod2} vs VTN: Double Cross
  • Multiple target thresholds.
    • d6 / 2d6kh1 / 2d6kl1 vs VTNs: Strike!
    • 2d6+?{Mod} vs FTNs: Powered By The Apocalypse (Apocalypse World, Dungeon World, Masks, etc.), Magical Fury, HoL, World of Dungeons 1979
    • 2d6+ / 3d6kh2+ / 3d6kl2+ vs FTNs: PbtA with advantage/disadvantage (Legacy)
    • ?{Mod}d6kh1 vs FTNs: Forged In The Dark (Blades In The Dark, Scum & Villainy, etc.)
    • d8+?{Mod} vs FTNs: Sparks of Light
    • ?{Mod}d10kh1 vs FTNs: Spire
    • d20+?{Mod} vs VTNs: Pathfinder 2nd Edition

• Roll above or below a target.
  • Xd6kn1 hi-lo: Lasers and Feelings
  • Xd10+kn1 hi-lo: Trollbabe

• Roll and count dice meeting a criterion. Note: Roll20 uses <4 to mean counting dice less than or equal to 4.
  • Single dice pool.
    • ?{Mod}d6>4 vs VTN: Burning Wheel (Burning Empires), Torchbearer
    • ?{Mod}d6>5 vs VTN: Aletheia
    • ?{Mod1}d6>(5+?{Mod2}) vs VTN: Shadowrun, Tiny d6 (Tiny Dungeon, Frontier..), Paladin
    • ?{Mod1}d6=?{ID}: The Farm
    • ?{Mod1}d6<?{Mod2} vs VTN: Tenra Bansho Zero
    • ?{Mod1}d6>4f<3 vs VTN: Macho
    • ?{Mod1-1}d6>3+d6!!cf1>3 vs VTN: DC Heroes (equivalent with custom dice)
    • ?{Mod1}d6cf6<?{Mod2}: Costume Fairy Adventures
    • Xd6 even vs VTN: A Faery's Tale
    • ?{Mod1}d10>(7+?{Mod2}) vs VTN: Old World of Darkness (Vampire, Werewolf, Mage, etc..)
    • ?{Mod1}d20>(15+?{Mod2}) vs VTN: Eoris Essence
    • With single dice values significant:
      • ?{Mod1-1}d6>5+d6cf1>5: Paranoia Red Clearance/White Box
      • 2d20cs20<${Mod2}: Modiphius 2d20 (Infinity)
      • d6+ >= each of 2d10 special match: Ironsworn
  • Multiple significant dice pools.
    • Xd6+Yd6+Zd6 == 6: Modiphius d6 (Forbidden Lands, Mutant Year Zero, Tales From The Loop..)
    • (?{Discipline}+?{Exhaustion}+?{Madness})d6<3 vs ?{Pain}d6<3: Don't Rest Your Head
    • Xd6+Yd6 >= 4: Mythender
  • 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+: 7th Sea 2nd
  • Xd10 form matching sets: One Roll Engine (Godlike, Wild Talents, Reign), Hollowpoint, Legends of the Wulin

• Other.
  • Card based.
    • Draw French >= VTN: Retrocausality
    • Draw French, variable criteria: Pretty Fairy Princesses
    • Draw Tarot <= VTN: Fugue (Alas Vegas)
    • Draw art card and interpret: Everway
  • Other-other.
    • Form chain from X dominoes: Noumenon
    • Draw X stones out of a bag: Mystic Empyrean
    • Pull X Jenga pieces: Dread
    • Beat the GM at physical exercise: LIFTS

• Non-functional systems.
  • (3+?{Skill})d6 odd/even vs Skill: House of Horiku (broken - inverted success chance)
  • d?{Mod1}+?{Mod2} vs VTN: Witch Girls Adventures (certain "level up" thresholds in mod calculation reduce chance)

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.