Decodia: Hacker Logic Puzzle

Slip into the terminal and break into a chain of secure systems, one puzzle at a time.

Decodia is a hacking-themed logic puzzle game. The hacking is all story; the gameplay is pure puzzle solving, so you never need to know anything about computers or code.

Every mission is a short break-in with several gates to crack:
• Code locks: read the colors of earlier wrong tries and deduce the code.
• Token forging: overlay circuit fragments until they match the target exactly.
• Network rerouting: rotate pipe tiles until the signal reaches every node.
• Cipher decoding: turn the dial and decrypt intercepted messages.
• Word hunts: find the words of an intercepted message hidden in a letter grid.
• Infiltration: step past turning cameras and reach the exit unseen.
• Code probes: read the scored guesses and name the hidden symbol code.
• Firewalls: slide blocks out of the way to free a trapped packet.
• Signal maps: rebuild hidden pictures from row and column clues.
• Uplinks: wire numbered servers together with straight cables that never cross.
• Laser locks: flip mirrors until the beam lights every receiver.
• Frequency jamming: give linked transmitters different channels.
• Data push: shove data blocks into the shredder slots, one step at a time.
• Circuit tracing: solder one unbroken trace through every pad on the board.
• Data sorting: move packets between stacks until every symbol has a stack of its own.
• Checksums: fill digit grids until every row and column adds up to its total.
• Alibis: match suspects to their login times from a handful of clues.

Side jobs branch off the map with puzzles of their own: binary grids, logic-gate locks, packets sliding on ice and trap scans.

Every wrong answer raises your trace; fill the meter and the system rotates its keys. Stuck? Up to three hints per puzzle; the first is always free.

Finish missions to unlock the next ones, earn BREACHED, CLEAN and GHOST ranks, and collect 30 achievement badges. Can you clear a mission with no hints, no trace and under the target time?

• 60 handcrafted missions in 12 chapters, plus 4 side jobs
• 21 kinds of puzzles, all solved by logic, never by guessing
• Free to play: energy for new missions refills over time, and Chapter 1 and replays are always free
• No account; one optional purchase removes all ads and gives unlimited energy
• Plays offline; your progress stays on your device
• One-handed portrait play with sound and haptic feedback
• Play in English, German, French, Italian, Spanish or Turkish