An open‑world puzzle game set on a mysterious island filled with line‑drawing panels that teach rules organically, culminating in layered meta‑puzzles and perspective tricks.
- Developer: Number None (Jonathan Blow)
- Release: 2016 • Platforms: PC, PS4 (later Xbox One, iOS)
- Genre: First‑person puzzle/exploration
- Notable mechanics: Rule‑teaching panel sequences, environmental line puzzles (perspective), non‑linear region progression, audio logs, challenge run endgame
- Reception: Critically acclaimed for puzzle design and discovery‑driven learning; notable for depth and elegant pedagogy