Night School

A free browser-based escape game set inside an elementary school at night.
Solve a series of puzzles — including logic puzzles, observation challenges, and wordplay — to find a way out. The game is designed to recreate the sense of mystery and discovery found in real-life escape room experiences.
No game overs or dead ends — players can progress at their own pace. Hints are available on each page for those who get stuck.
Note: this game is available in Japanese only.