CORDON: Reactor Puzzle

Energy is loose in the reactor. You can't touch the particles – but you can reshape the space around them.

CORDON is a calm, clever puzzle game about containment. Draw barriers across the chamber, seal off pockets and trap glowing energy before it slips away. Every barrier grows from where you tap – and it stays fragile until it reaches a wall. Timing, planning and a steady hand win the day.

HOW IT PLAYS • Tap to raise a barrier, swipe to aim it • Squeeze particles into a small space, keep apart what must never meet, guide them into collectors • Plan with a limited number of barriers or a tight energy budget • Earn up to three stars per level for elegant solutions

100 HANDCRAFTED LEVELS Ten sectors, each with a new idea: magnets and repulsors, rhythm gates, damper fields, currents, phantom particles that drift through ordinary walls, one-way membranes, sensor plates and transmuters that turn one particle into another. The final sectors combine everything – no hints, just you and the reactor.

SEVEN KINDS OF PARTICLES Steady ions, fast sparks, heavy mass, charged particles that follow magnets, volatile flares that react on contact, seeds that multiply while they have room – and phantoms.

LEARN AS YOU PLAY Press and hold anything in the reactor to see what it does. The built-in encyclopedia explains every particle, tool and device with live animated demos.

MADE WITH CARE • Glowing neon visuals and a calm ambient soundtrack • Music, sound effects and vibration can be switched off separately • Plays offline – no account, no ads, no tracking • Sector 1 (10 levels) is free – unlock all 100 levels with a single in-app purchase, no subscription • English, German, Spanish and French • Designed for iPhone and iPad

Seal the core. Contain the energy. Enter CORDON.

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