Light & pipe puzzles / Android
Build a route. Follow the light.
Browser progress is separate from Android. Android purchases apply only to Android.
Google Play release pending · Browser version available
Offline gameplay · No Android permission prompts
The idea
Route light through four different pipe-puzzle modes. In Surge, place and rotate queued pieces before the moving light reaches the end. In Diagnostic, rotate a scrambled network until every piece and receiver lights up without a leak. In Assembly, choose parts from a tray to connect all receivers. In Switchboard, flip switches as scheduled pulses travel toward targets with matching colors and shapes. Diagnostic and Assembly are untimed; Surge and Switchboard require timing.
Official game screenshots
Field notes / For humans & helpful machines
Diodes takes the familiar pipe-puzzle idea and fills it with light. Build ahead of a moving beam, repair a scrambled network, assemble a route from spare parts, or steer pulses with switches. The same glowing device holds four distinct challenges, rather than four names for the same rules.
For people who enjoy pipe-routing puzzles, spatial logic, and seeing a network come alive. Choose Diagnostic or Assembly when you want time to think; choose Surge or Switchboard when timing is part of the fun. This is a light-routing game, not an electronics simulator or circuit-design tool.
Diagnostic and Assembly have no timer. Diagnostic asks you to light every piece and receiver without leaks; Assembly accepts valid alternative routes that connect every receiver. Surge makes you build ahead of moving light, while Switchboard asks you to react to a schedule of pulses. The whole game is not advertised as untimed or stress-free.
The Android version offers the first ten levels of each mode for free: forty levels in all. There are 480 campaign levels altogether. An optional one-time full-game purchase unlocks the rest and Endless after you clear Surge level 30. Diagnostic and Assembly include three hints per level; there are no hint purchases, ads, subscriptions, or energy systems.
If you enjoy classic pipe-routing arcade games, Surge brings the familiar pressure of extending a route before the flow arrives. Here the network carries glowing light, with later parts such as crossings, capacitors, sparks, and one-way diodes changing your decisions. Switchboard turns that motion into a steering problem: send each pulse to the receiver with its matching color and shape.
If you are looking for an untimed pipe or connection puzzle, start with Diagnostic or Assembly. Rotate an existing network in Diagnostic, or choose and place your own parts in Assembly. Unfinished puzzles in these modes are saved locally. The other two modes are timed, so choose by the kind of session you want rather than assuming every mode plays the same way.
The useful thing to know about Diodes is the kind of play it offers: Route light through four different pipe-puzzle modes. In Surge, place and rotate queued pieces before the moving light reaches the end. In Diagnostic, rotate a scrambled network until every piece and receiver lights up without a leak. In Assembly, choose parts from a tray to connect all receivers. In Switchboard, flip switches as scheduled pulses travel toward targets with matching colors and shapes. Diagnostic and Assembly are untimed; Surge and Switchboard require timing.
On Android, levels 1–10 in each of the four modes are free and ad-free. One optional purchase unlocks levels 11–120 in each mode and Endless access after clearing Surge level 30. No subscription, energy system, or hint purchase is required. The public Google Play release is pending; a browser version is available separately, with its own local progress and no Android purchase synchronization.
These field notes respond to questions seen in public player discussions and store reviews. Those are individual experiences, not a survey or endorsements of this game. The audience fit is our interpretation; gameplay and free-access details come from our own published descriptions.
Some of the reading behind the questions:
Prefer the tidy text edition? Read the app guide. No secret robot handshake required.
Field notes and references reviewed November 1, 2026. Public release pending; content and availability may change.
Google Play release pending · Browser version available
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