Rilyvro Thax

Rilyvro Thax is a fiber-optic routing puzzle game built on a real optical power-budget engine. Each level places you in front of a blueprint grid with an optical line terminal on one end and subscriber drops scattered across the board. Your job: drag cable spans, place splitters, connectors, fusion splices, and amplifiers to build a working fiber tree that delivers enough signal to every drop — within budget. The physics are genuine. Attenuation follows real G.652 and G.657 fiber-type constants. Splitter losses match real passive optical network ratios. The power engine computes received signal at every drop on every edit and color-codes each result live: cyan for safe, gold for marginal, red for fail or overload. There is no guessing — every placement has a measurable consequence. Twelve hand-crafted campaign levels ramp from a simple single-span connection to complex multi-tier split trees with cascaded amplifiers and tight margin budgets. A sandbox mode gives you an unlimited component budget and a free grid to design your own networks, with the option to attach a site reference photo to each saved build. A built-in reference screen includes an interactive power calculator, a signal-along-path chart, and component data tables drawn from real industry standards. No accounts. No ads. No internet required after launch. All progress is stored locally on your device.