Eclipse Duel
Light and dark, head to head. Free in your browser, no download.
About Eclipse Duel
Eclipse Duel: Light and dark, head to head. Extreme tables add one of the three rule packs — Merciless, Eclipse or Eruption — or throw all of them at once.
The table
2 players: you and 1 computer rival. Everyone starts with 7 cards.
Sharp rivals shed high-value cards first, save their wilds for the end and keep the colour they hold most of alive. They are the standard opponent.
The deck
The table uses the 126-card Prism deck: numbers 0–9 in four energies (Flare ▲, Surge ●, Volt ◆, Void ■), two each of FLIP, FREEZE, +2, SHIELD and SWAP per energy, 6 PRISM wilds and 4 +4 wilds.
The Eclipse pack adds ECLIPSE cards that flip the whole table between the light side and the dark side.
How a turn works
On your turn, play one card that matches the active energy (colour) or the symbol of the top card. Wild cards play on anything and you choose the next energy.
Can't play? Draw one card and your turn passes.
Special rules at this table
- Stacking: answer a +2 with a +2 or a +4 with a +4 to pass the growing pile to the next player. The first player who can't stack draws it all.
- SHIELD cards stay in front of you and block the next draw attack aimed at you, however big it is.
- The Riot Meter charges with every card you play; combos charge it faster. At 100% hit RIOT BURST to shatter up to 2 number cards of the active energy at once.
- On the dark side FREEZE becomes FREEZE ALL, +2 becomes +5, +4 becomes ROULETTE and SWAP becomes PURGE. Numbers keep their value.
How to win
Be the first to shed every card. Your score is 100 for the win plus the points left in your rivals' hands, a speed bonus for quick wins, 25 per Riot Burst, a combo bonus and 50 extra for winning without drawing a single card.
Tips for Eclipse Duel
- Count what flips. Before you play ECLIPSE, check how your action cards change on the other side — a +2 becomes +5 on the dark side.
- Charge the meter with combos. Several plays in a row fill it faster; burst when it shatters your highest-point number cards.
- Play a SHIELD early when your hand is large — it waits in front of you and eats the next +4 or +10.
- This mode trains tactics on your skill radar and pays ×1.3 XP.
Rule guides for this mode
Frequently asked questions
Is Eclipse Duel free to play?
Yes. Eclipse Duel and every other Prism Riot mode are free in your browser with no download, no sign-up and no account. Progress is saved in your browser.
Can I play Eclipse Duel offline?
Yes. After your first visit Prism Riot works offline — add it to your home screen from the browser menu and it opens like an app.
How many players are in Eclipse Duel?
2 players: you against 1 computer opponent at sharp difficulty. Each starts with 7 cards.
Can you stack draw cards?
Yes, +2 on +2 and +4 on +4. A +4 cannot be stacked on a +2 here (it can in Mayhem and the Merciless modes).
Can I challenge a friend on the same deal?
Yes. After a round, tap “Challenge a friend” — the link opens the exact same shuffle for them, with your score to beat.