Prism Riot FAQ

An original colour-matching card game: match the energy (colour) or the symbol on the top card, use action cards to attack and defend, and be the first to shed your hand. It has 65 modes, from classic four-player tables and Crazy Eights to no-mercy style rule packs, solitaire-style puzzles and daily challenges.

No. Prism Riot is an original game by Dixon App Studio with its own deck and rules — four energies with symbols, FLIP, FREEZE, SHIELD and SWAP cards, and a Riot Meter. It isn't affiliated with Mattel. UNO® is a trademark of Mattel, Inc., mentioned on this site only to describe comparable rules.

65, in seven groups: Battle, Classic, Chaos, Extreme, House Rules, Solo and Party. See them all on the play page.

126 in the standard Prism deck: per energy one 0, two each of 1–9 and two each of five action cards, plus 6 PRISM wilds and 4 +4 wilds. The Crazy Eights tables use a 76-card number deck, and the rule packs add more cards.

Yes. There's no chat, no gambling and nothing to buy on the website. Chill Table has gentle rivals for beginners, Riot Academy highlights the best card and explains why, and Pass & Play seats up to four people on one device.

Yes. Every card shows its energy's symbol — ▲ Flare, ● Surge, ◆ Volt, ■ Void — as well as its colour, so no move depends on telling colours apart.

Yes, every mode is free in the browser. The site is supported by ads, which appear in page content — never over the card table.

No. The game runs in your browser on phones, tablets and computers. There are no accounts.

After your first visit the game files are cached, so tables you've opened keep working if your connection drops. The phone app is built for fully offline play.

In your browser's local storage on this device — level, XP, streak, badges and settings. Clearing site data removes it; use the backup in Settings to copy it to another browser.

Prism Riot has no live online matchmaking. You can play together on one device with Pass & Play, or send a Friend Challenge link: your friend gets the exact same deal and tries to beat your score.

Nine: English, Spanish, Portuguese, French, German, Italian, Russian, Indonesian and Turkish. Change it in Settings.

Yes — for iPhone and Android, in review at Google Play and the App Store. It has the same modes and plays fully offline.

No. Web and app progress are kept separately on each device, because neither uses an account.

The app offers a one-time Remove Ads purchase. The website stays free and ad-supported.

+2 on +2 and +4 on +4, yes, in almost every mode. +4 on +2 (cross-stacking) only in Mayhem, the Merciless modes, Total Chaos and Riot Lab tables with it switched on.

Yes. Going out on a PRISM wild or a +4 is legal in every mode.

Draw one card and your turn passes. Draw Hunt, Mayhem and Purge Party use draw-until-you-can-play instead.

Only in the Last Card Call and House Party modes: press LAST CARD when you're down to one, or draw two if a rival catches you.