Creating a Pure‑CSS Escape‑Room Game

The article explains how to recreate the classic "escape room" puzzle genre entirely with CSS, starting with a brief history of the original Flash‑based game "The Red Room" and introducing the concept of a pure‑CSS implementation.

It first outlines a step‑by‑step "攻略" (strategy) that lists the actions a player must perform, then shows why the input[type="checkbox"] element is the ideal switch for toggling game states. The author describes how the label element paired with the :checked pseudo‑class and sibling selectors can reveal or hide items such as a globe, hammer, USB key, and door.

<input type="radio" id="globe" class="globe-trigger"/>
<label for="globe" class="globe"><img src="..." class="w-8"/></label>

A simple switch example is provided, illustrating the HTML markup and the accompanying CSS that hides the original input, displays the image when the switch is checked, and applies transformations to simulate item collection.

.hammer { display: none; }
.globe-trigger:checked ~ .globe { pointer-events: none; }
.hammer-trigger:checked ~ .hammer { display: inline‑block; }

For scene navigation, the tutorial uses a set of hidden input[type="radio"] elements as navigation triggers. CSS variables define the stage width and current scene index, while a @for loop (Sass syntax) generates the necessary rules to shift the long background image horizontally based on the selected navigation radio.

@for $i from 1 through 4 {
  .nav-trigger-#{$i}:checked ~ .stage {
    --scene-id: #{$i - 1};
  }
}
.stage { transform: translateY(calc(var(--stage-width) * var(--scene-id) * -1)); }

The "camera" class crops the oversized map to a fixed viewport, and the "scene" class ensures each segment occupies the full stage dimensions. By clicking navigation arrows (styled labels), the user moves between scenes, revealing new interactive objects.

Finally, the author confirms that all required knowledge—switches, scene switching, and layout—has been covered, and provides a live CodePen demo where the complete pure‑CSS escape‑room game can be played.