House rules generator

Why house rules?

Colour-matching card games are simple by design, which is exactly why families invent house rules. Each rule in this generator changes one thing — how draw cards work, what special numbers do, how fast you must play or how many cards you hold — and they combine in surprising ways. Stacking plus cross-stacking makes huge piles; jump-in plus doubles makes every turn frantic; no mercy plus short hands is over in minutes.

Every rule here is built into Prism Riot, so you can test a combination against the computer before bringing it to the table. Read the house rules guide for what each one does to the game, or build a table by hand in Riot Lab.

All rules in the generator

• Stack draws: +2 on +2 and +4 on +4 pass the pile on.
• Cross-stacking: +4 can be stacked on a +2.
• Seven swap: Playing a 7 swaps hands with any player.
• Zero rotate: Playing a 0 rotates every hand one seat.
• Jump-In: An identical card can be played out of turn.
• Last Card Call: Call your last card or draw two if caught.
• Doubles: Play every card of the same number at once.
• Draw until you play: Keep drawing until a playable card turns up.
• No mercy: +6, +10, PURGE and a 25-card knockout.
• Dark side: ECLIPSE cards flip the table; actions get harsher.
• Eruption: Drawing erupts 0–4 random cards.
• Speed round: Eight seconds per turn.
• Short hands: Deal five cards instead of seven.
• Big hands: Deal ten cards.
• Wild storm: Six extra wild cards in the deck.
• No shields: SHIELD cards do nothing — every attack lands.
• Anything goes: Every card plays on every card.