Overview

Cthulhu Dice is a quick dice game where cultists try to drive each other mad. Players roll a custom 12-sided die to steal Sanity from opponents or lose it to Cthulhu. The last sane cultist wins – unless Cthulhu drives everyone mad, in which case Cthulhu wins.

Components

• 1 custom 12-sided die (with 5 different symbols)
• 18 glass Sanity tokens
• 1 ziplock bag
• Rules

Setup

1. Each player takes 3 Sanity tokens.
2. Set aside any extra tokens (not used).
3. The game owner decides who is the first Caster. In a series of games, the previous winner goes first.

Turn Structure

1. The Caster picks a Victim (any other player with Sanity).
2. The Caster rolls the die; results apply immediately.
3. The Victim responds by rolling the die with the Caster as their target; results apply immediately.
4. This completes one turn. Play passes clockwise to the next player.

You may not pass – you must roll.

Actions

Die Results:

Symbol	Count on Die	Effect
Yellow Sign	4 faces	Target loses 1 Sanity to Cthulhu (center of table)
Tentacle	4 faces	Caster takes 1 Sanity from Victim (regardless of who rolled it)
Elder Sign	1 face	Roller gains 1 Sanity from Cthulhu (if any available)
Cthulhu	1 face	Everyone loses 1 Sanity to Cthulhu
Eye	2 faces	Roller chooses any of the above results

Note: When a mad Caster rolls Tentacle, the stolen Sanity goes to Cthulhu instead of the Caster.

Scoring / Victory Conditions

• Win: Be the only player with Sanity remaining at the end of a turn.
• Cthulhu wins: If all players are Mad (0 Sanity) at the end of a turn, nobody wins – Cthulhu wins.

Special Rules & Edge Cases

Madness:

• Losing all Sanity = going Mad.
• Mad players can still attack on their turn but cannot be targeted.
• Stealing Sanity while Mad: the Sanity goes to Cthulhu, not to you.
• Losing Sanity while Mad has no effect.
• The only way to recover from Madness is rolling Elder Sign and taking Sanity back from Cthulhu.

Rival Cults (2-player variant):

• Each player controls 2 or 3 cultists.
• Players still alternate turns.
• Winner is the player with the last sane cultist.
• Sometimes the best strategy is to attack your own cultist.

Player Reference

Symbol	Effect
Yellow Sign	Target loses 1 Sanity to Cthulhu
Tentacle	Caster steals 1 Sanity from Victim
Elder Sign	Roller gains 1 Sanity from Cthulhu
Cthulhu	All players lose 1 Sanity to Cthulhu
Eye	Choose any result

• Start: 3 Sanity each
• Mad = 0 Sanity (can attack, can’t be targeted, stolen Sanity goes to Cthulhu)
• Last sane player wins; all mad = Cthulhu wins