The Grimpen Moor (3D)
🕵️ A Sherlock Holmes game — The consulting detective himself
The great gothic landscape of the canon, open under the moon. Rolling moorland stretches in every direction — granite tors, wind, fog, and the lights of Princetown prison far off. Seven places from The Hound of the Baskervilles wait to be found: the yew alley where Sir Charles died, the stone hut where the man on the tor camped, Merripit House, the convict's candle — and, at the heart of the Grimpen Mire, the old tin mine, reachable only along Stapleton's wand-marked path. Stray from the wands and the mire takes hold. And somewhere out there, something phosphorescent crosses the ridges.
- ✅ Free
- 🔓 No sign-up
- 🌐 Runs in your browser
- 🖱️ Keyboard & mouse
What it does
A real open moor
Rolling procedural terrain you walk freely: weathered granite tors and their boulder fields, grass tussocks that stir in the wind, heather, bracken and gorse, drystone walls and a prehistoric stone row, ground fog drifting through the hollows, and moonlight casting real shadows.
The Grimpen Mire
A genuine hazard: safe only along the marked wands, exactly as Stapleton kept it. Stray, and you'll fight to wrench free.
Seven canon discoveries
Every find is drawn faithfully from The Hound of the Baskervilles — and the hound itself is out there.
How to play
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1
Click to take the moor; walk with WASD, sprint with Shift.
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2
Follow the glimmers; press E at each discovery.
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3
Cross the mire by the wands alone — and find all seven.
The moor of The Hound of the Baskervilles
The Hound of the Baskervilles (1902) is the most famous Sherlock Holmes novel, and its real star is Dartmoor: miles of open moorland, granite tors, prehistoric stone huts and the treacherous Grimpen Mire, a bog that Stapleton alone knows how to cross. Conan Doyle based it on the real Dartmoor in Devon, near Princetown and its prison.
This game turns that landscape into a place you can walk. Every location comes from the novel: Baskerville Hall and its yew alley, the gate where Sir Charles Baskerville died, Merripit House, the stone hut on the tor, the convict Selden's candle and the abandoned tin mine on the island in the mire.
Crossing the Grimpen Mire
In the novel Stapleton marks his safe path through the mire with little wands stuck in the bog. The game does the same. Keep to the wands and the ground holds; step off and the mire drags at you. The old tin mine at its centre, where the hound was kept, is the last of the seven discoveries.
"The longer one stays here the more does the spirit of the moor sink into one's soul." Built in three.js; entirely in your browser.
Frequently asked questions
Is there a Hound of the Baskervilles game I can play online?
Yes. The Grimpen Moor is a free 3D game that runs in your browser with nothing to install. You explore the moor from the novel and find seven of its places. It needs a keyboard and mouse, so play it on a desktop or laptop.
Is the Grimpen Mire a real place?
Not by that name. Conan Doyle invented it, but he based it on the real bogs of Dartmoor, and Fox Tor Mire near Princetown is often named as his model.
Do I need to have read the novel?
No, but it helps. Every discovery comes with a note on its part in the story, so the game works as a guided tour of the novel.