Free · 2–6 players · No sign-up

Stack Crystals.
Send Rubble.

Stack crystal, steal runes and blast them at up to five rivals. Last field standing wins.

Your name

Play with friends

Make a private room and send the link, or type a friend's 4-letter code. Up to 6 players, chat, rematch.

Room code

Practice vs bots

Works offline. Bots stack, dig and fire runes at you and at each other.

Bots

Difficulty

Story: The Climb

Chapter 1 "First Cracks": 8 rivals with their own tricks, a boss, and 3 stars to earn in every fight. Works offline.

How it works

Three moves to mayhem

1Stack and shatter

Faceted crystals fall into your 12-wide well. Fill a row and it shatters.
2Grab runes

Shattered rows seed runes. Clear the row a rune sits in and it's yours.
3Fire at rivals

Press 1–6 on the top row or number pad (or tap a rival) to fire your front power and bury, fog, shake or swap their field. Last one standing wins.

Live in your browser

Watch three bots brawl

Ana

Boris

Cleo

Rune arsenal

Nine runes. Endless dirty tricks.

Clear a line holding a rune to bank it (up to 10). Fire the highlighted front rune at any player, including yourself, with their number key or target button. Press Q to move the front power to the back without using it.

Your rivals are stacking.

One tap puts you in a room with whoever is online. Rounds take about three minutes.

How to play

Pieces of crystal fall into your 12-wide well. Fill a row to clear it. Clearing lines seeds runes into your field; clear a line that holds one and it joins your rune queue (max 10). Clearing 2, 3 or 4+ lines at once drops 1, 2 or 4 rubble lines on every rival.

Move	`←` `→`	Rotate	`Z` `X` or `↑`
Soft drop	`↓`	Hard drop	`Space`
Hold piece	`C` or `Shift`	Use rune on player	`1`–`6`, top row or number pad (your number = yourself)
Cycle powers	`Q` (press once)	Discard front power	`D`
Guard (Battle Lab / Pro)	`G`	Mute	`M`
Pause single-player	`P` or `Esc`	Help	Top-bar ? button

Touch controls

Buttons along the bottom move, rotate, hold and drop.

Colour-blind assist

Adds a symbol to each crystal type, so pieces never have to be told apart by colour. Runes always show their letter.

Number keys and the numbered buttons fire your front rune at that player (your own number = yourself). Press Q to cycle powers without using them; each number-key press fires the selected front power. Clicking a target keeps the game controls active; you do not need to click the well again.

Online chat: hide someone's messages with Mute next to their name in the lobby, or type /mute name (and /unmute name) in any chat box.

Stack Crystals.
Send Rubble.

Play with friends

Practice vs bots

Story: The Climb

Online rooms

Three moves to mayhem

1Stack and shatter

2Grab runes

3Fire at rivals

Watch three bots brawl

Nine runes. Endless dirty tricks.

Your rivals are stacking.

Controls before you ready up

Profile

Locker

Shop

Progress

Ranked & leaderboards

Story

Account

Stack Crystals.Send Rubble.

Play with friends

Practice vs bots

Story: The Climb

Online rooms

Three moves to mayhem

1Stack and shatter

2Grab runes

3Fire at rivals

Watch three bots brawl

Nine runes. Endless dirty tricks.

Your rivals are stacking.

Controls before you ready up

Profile

Locker

Shop

Progress

Ranked & leaderboards

Story

Account

Stack Crystals.
Send Rubble.