Crackline: Vault Heist Puzzle

MUR Trading LLC

About this game

Crackline is a code-breaking heist puzzle. Every round, you play both sides of the vault door.

BUILD YOUR VAULT
Pick a secret code of 4 symbols from 6 shapes. Repeats are allowed. Then hide up to 2 traps: an attacker can't see them, but every wrong guess on a trapped slot burns an extra guess.

WATCH THE AI TRY
An AI safecracker gets 8 guesses to break into the vault you just built. Watch every attempt play out, and see your traps spring. Hold it off and you earn a defense bonus.

CRACK A RIVAL VAULT
Now it's your turn. You get 8 guesses to open a rival vault. After each guess, every symbol gets a ring:
- Solid green: right symbol, right spot
- Dashed yellow: in the code, wrong spot
- Gray: not in the code
Watch out, rival vaults can be trapped too.

CLAIM THE HAUL
Crack a vault in fewer guesses to earn more coins. Your defense rate, vaults cracked, average guesses per crack and coin total are saved on your phone.

WHY YOU'LL KEEP PLAYING
- Quick rounds, perfect for a few minutes
- Easy to learn, with real strategy in where you place traps
- Shapes and colors are both distinct, so the symbols read clearly for colorblind players
- Plays fully offline
- No ads, no purchases, no account, no data collected

What’s new

New: Daily Vault, difficulty levels, and power-ups!