Mirrors & reflection
Turn a beam around an obstacle by changing a mirror’s angle.
Let the light find a way.
A light bending puzzle game in forgotten halls. Turn the instruments. Awaken the stone.
80 chambers · first 3 free · play in your browser
Free route hints are always included. Explore at your own pace.
0 / 80 discoveredYouTube loads only when you choose to watch.
- Tap an instrument to select it.
- Drag its body to move it into the light.
- Drag its round handle to rotate, or open Adjust instruments for the angle slider.
TRY IT · 15 SEC
Turn the mirror. Light the gate.
Drag the mirror, or turn its round handle until the red beam reaches the gate.
01
Three turns · focus · red
✓The silent gate
Follow the light
OPTICAL BENCH
Beautiful. You found a way.
Every receiver has the light it needs.
Free route hints are always included. Explore at your own pace.
Drag to move Drag the round handle to rotate
Choose a tool, then use arrow keys to move or Q and E to rotate. Hold Shift for finer steps. Undo with Control or Command Z. Select a tool below to reach the same controls without dragging.
Simple tools. Surprising combinations.
Learn reflection, refraction, and prism dispersion by moving things around. The light gives you the answer.
Lenses & focus
Bring a wide beam together or spread it across a larger area.
Prisms & dispersion
Refract white light and discover the different colors within it.
Splitters, filters & apertures
Divide energy, select colors, and decide where light is allowed to go.
A light bending puzzle game with room to experiment.
Three free chambers. A whole observatory to rediscover.
Prism Riddle is an optical puzzle game about making a route, not just finding the right angle. A lamp casts a finite-width beam through a stone chamber. Your instruments can turn it, gather it, separate its colors or divide its energy. The goal is to awaken the gate lenses while respecting the obstacles and the requirements of every target.
There is no fixed grid to dictate your answer. Mirrors, lenses and prisms move through continuous space, and the light reacts to every change. A promising route might fail because the beam is too wide for an opening, a splitter leaves a branch too weak, or a colored gate receives too much of the wrong wavelength. Each failure gives you something specific to investigate.
Start with a real challenge
The first chamber already combines five instruments, several changes of direction, a focused beam and a color requirement. Basic tool explanations are available beside the scene, so the formal puzzles can focus on combinations. The first three chambers are free: a mirror route, a two-lens relay and a complete prism-dispersion puzzle.
The current collection has 80 original chambers, with larger scenes and more demanding combinations later on. Some have two lamps; others require several colored gates to light together while nearby lenses stay dark. More chambers are planned as the observatory grows.
Mirror puzzles: carry the route around the stone
A mirror preserves the light's colors while changing its direction. Its position decides which part of a beam it can catch. In a larger mirror puzzle, each turn affects all the turns after it, so a useful solution comes from coordinating the route across several chambers.
Lens puzzles: choose where the light becomes narrow
A convex lens can bring parallel rays together. A concave lens spreads them, or changes a beam that is already converging. Put two lenses together and their spacing becomes part of the puzzle. The useful point is not always the brightest-looking point: it is where the gate or passage needs the beam to fit.
Prism puzzles: make color part of the route
A prism bends different wavelengths by different amounts, revealing the spectrum in white light. A mirror can redirect that spectrum and a filter can select part of it. Color filtering also removes energy, so the final gate needs both the right color and enough of it.
Play an optical puzzle online, at your own pace
Start in a modern browser without installing a game client. Use a mouse, touch controls, the keyboard or numeric adjustments. Full-screen mode puts the chamber in view; undo and redo help you compare experiments. There is no countdown. Your active play time and personal best are recorded when you complete a chamber.
Share a discovery, keep your own progress
Finishing a chamber opens a clear result dialog with your time, next-chamber navigation and social sharing options. A challenge link takes a friend to the same chamber. Completed levels, layouts and personal bests stay in your current browser, ready when you return.
让光转弯，也让思路转个弯。
前三关免费，先真正体验一次光学解谜。
Prism Riddle 是一款在石窟遗迹中规划光路的解谜游戏。每关有独立设计的光源、岩壁、通道和石门。你需要通过移动与旋转装置，让光转向、会聚、分色或分成不同分支，满足每个光芯的要求。
游戏没有固定网格，也不会拿你的布局与一张标准答案图比较。光到达了目标却仍未通过，可能是光束太宽、分束后的能量不够，或颜色不够纯净。看清缺少的条件，再决定该调整哪一段光路。
第一关就需要认真组合
正式关卡从五个装置开始，包含连续转向、光束会聚与颜色条件。基础说明放在工具介绍中，让关卡本身专注于组合。前三关免费，依次体验镜面通路、双透镜配合和完整的棱镜色散谜题。
当前共有八十个原创关卡，后面会出现更大的空间、两盏光源、多色石门和必须保持黑暗的区域。遗迹中的关卡还会持续增加。
镜面：改变方向，也改变后续整条光路
镜子的长度有限，只能反射真正照到镜面的那部分光。前一面镜子的位置和角度，会影响后面所有装置的输入。需要穿过多段通道时，路线要整体协调。
透镜：让光在需要的位置变窄
凸透镜可以使平行光会聚，凹透镜可以让光发散，也能改变正在会聚的光束。组合两片透镜时，它们之间的距离同样重要。要考虑的是光到达通道或石门时的形态。
棱镜：把颜色变成解谜的一部分
棱镜使不同波长以不同角度偏折，展现白光中隐藏的光谱。镜子可以接住光谱，滤色片可以留下需要的波段。但滤色会减少能量，最终需要同时满足颜色与亮度条件。
慢慢观察，也可以精确调整
直接在浏览器中开始，支持鼠标、触屏、键盘和数值精调。可以全屏查看石窟，用撤销和重做比较不同尝试。没有倒计时，完成后会记录实际用时和最佳成绩。
把同一关分享给朋友
通过后会弹出结果、用时和下一关入口，也可以分享到社交网络或复制挑战链接。朋友打开链接会进入同一关；你的布局、完成记录和最佳成绩保存在自己的浏览器中。
For the joy of figuring it out.
Prism Riddle is a browser-based physics puzzle game about arranging optical tools. There is no countdown and no single correct layout. Try an idea, watch the light, and follow what you discover.
Looking for games like Prism Rules?
If you enjoy experimenting with light in Prism Rules, start with three free chambers from our 80-puzzle collection and explore the free workshop. Prism Riddle is an independent game with its own levels. It is not affiliated with or endorsed by Prism Rules.
Explore Prism Riddle →How do I play?
Drag a tool into the light. Select it and turn its round handle, or use the angle slider. Light every receiver to the stated energy and color requirements. Crossed receivers must stay dark. Hints are always available.
Will my progress be saved?
Your completed experiments and puzzle layouts are saved in this browser on this device. No account is needed. Clearing browser storage also clears your progress.
Can invitations unlock more chambers?
On prismriddle.com, invite new players who complete at least one of the first three formal chambers within 30 days. Chamber 4 needs 1 qualifying invitation, chamber 5 needs 3 total, and chamber 6 needs 6 total. Invitation access stops at chamber 20 with 153 total. Browser notifications are optional; full-game purchases and walkthroughs remain separate.
How does the light simulation work?
A finite-width beam is sampled across 27 wavelengths. Mirrors reflect, prisms refract, and lenses use a thin-lens approximation. Splitters divide energy and filters absorb unwanted wavelengths. The lab also includes a defined three-order diffraction grating, Stokes polarization and Fresnel glass interfaces. Coherent interference between independent ray paths and full wave optics are not simulated.