Is Eruption free to play?

Yes. Eruption 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 Eruption 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 Eruption?

4 players: you against 3 computer opponents 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.

Attack Card Game Online — Eruption (Random Card Launcher)

The draw pile erupts 0–4 cards. BLAST your rivals.. Free in your browser, no download.

About Eruption

Eruption: The draw pile erupts 0–4 cards. BLAST your rivals.. Extreme tables add one of the three rule packs — Merciless, Eclipse or Eruption — or throw all of them at once.

The table

4 players: you and 3 computer rivals. 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 Eruption pack adds BLAST cards in every energy and wild ALL BLAST cards.

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.
Instead of drawing one card, the pile erupts: 0 to 4 random cards (about 1.4 on average). BLAST forces the next player to erupt; ALL BLAST makes every rival erupt at once.

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 Eruption

Erupt when the pile is big. Eruptions average under two cards, so drawing is cheaper than it looks; save BLAST for a rival close to winning.
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 aggression on your skill radar and pays ×1.3 XP.