A techno-thriller point-and-click adventure game built with vanilla JavaScript. Featuring realistic hacking scenarios, RF signal analysis, and a story inspired by real-world technology and espionage.
Play Now: Open index.html in any modern browser
No installation required | Works offline | Mobile friendly
Estimated playtime: 2-4 hours
You are Ryan Weylant, a 42-year-old Dutch hacker living in Compascuum, a quiet village near the German border. Your peaceful morning is disrupted when your SSTV terminal picks up a mysterious transmission from a German military facility. What starts as curiosity becomes a race against time to expose a Russian infiltration operation codenamed Operation ZERFALL and prevent a devastating attack.
- Ryan Weylant - Protagonist, hacker, RF enthusiast (you!)
- Eva Weber ("E") - Whistleblower inside the facility
- Dr. Dmitri Volkov - Soviet weapons researcher, infiltrator
- Max Weylant - Ryan's wife, pragmatic support
- Chris Kubecka - OSINT expert and security researcher
- Dr. David Prinsloo - Antenna expert (TU Eindhoven)
- Cees Bassa - LOFAR specialist (ASTRON)
- Jaap Haartsen - Bluetooth inventor (real person!)
- Sierra-style point-and-click gameplay with modern web technologies
- No installation required - runs entirely in browser with zero dependencies
- Real-world technology - Features actual hacking tools (Flipper Zero, HackRF, Meshtastic)
- 18 handcrafted scenes - From your Dutch farmhouse to a German military facility
- Evidence-based investigation - Collect documents, decode messages, piece together the conspiracy
- Investigation board - Detective-style cork board to organize clues
- Regional map - Michelin-style paper map with accurate GPS coordinates
- Voice narration - Optional text-to-speech using Web Speech API
- Mobile-friendly - Touch controls fully supported
- Auto-save - Progress saved automatically via localStorage
- No fail states - Story-focused, not punishing
- Point-and-click to explore scenes and interact with objects
- Talk to characters and build a network of expert allies
- Collect evidence and analyze it on your investigation board
- Decode encrypted messages (ROT1 cipher puzzle)
- Use realistic hacking tools to infiltrate a secure facility
- Solve puzzles (passwords, ciphers, stealth challenges)
- Complete quests to progress the narrative
This project includes 200+ pages of detailed documentation:
- 📘 PROJECT_OVERVIEW.md - Complete project overview, FAQ, quick links
- 🔧 TECHNICAL_REFERENCE.md - Engine internals, all 12 systems, scene API, dev guide
- 🗺️ SCENES.md - Complete scene catalog (34 scenes)
- 📖 STORY.md - Full screenplay (20 story parts)
- 🎬 STORYBOARD.md - Visual storyboard with panels
- 🤝 CONTRIBUTING.md - Scene checklist, code style, story rules
- 🔍 FLOW_ANALYSIS.md - Scene flow QA report and flag registry
- 🔒 SECURITY_AUDIT.md - Static security audit (all findings resolved)
- Download/clone this repository
- Open
index.htmlin your browser - Start playing!
# Python 3
python -m http.server 8000
# Visit http://localhost:8000- Mouse/Touch: Click to interact with hotspots, advance dialogue
- I key: Toggle inventory
- Q key: Toggle quest log
- Escape: Close dialogs/menus
- Voice Toggle: Click 🔊 button in menu
- Pure HTML/CSS/JavaScript - No frameworks, no build process, no dependencies
- SVG Graphics - Scalable vector graphics for all 33 scenes (~10 MB)
- Web Speech API - Optional voice narration
- localStorage - Save game progress
- Pointer Events - Touch and mouse support
- Responsive Design - Desktop and mobile compatible
Why no frameworks? Maximum compatibility, zero build complexity, easy to understand and modify, no toolkit rot.
CyberQuest/
├── index.html # Main game entry point
├── README.md # This file
├── engine/ # Core game systems (~5,500 LOC)
│ ├── game.js # Main engine (4,000+ lines)
│ ├── player.js # Player character system
│ ├── voice.js # Voice narration system
│ ├── evidence-viewer.js # Evidence display system
│ ├── chat-interface.js # Chat UI system
│ ├── styles.css # Game styles
│ └── puzzles/
│ └── password-puzzle.js # Password/cipher puzzles
├── scenes/ # 33 game scenes (~22,000 LOC)
│ ├── intro/ # Opening sequence
│ ├── home/ # Kitchen (tutorial)
│ ├── livingroom/ # Living room + TV
│ ├── tvdocumentary/ # Documentary viewing
│ ├── mancave/ # Investigation hub ⭐
│ ├── sdr_bench/ # SDR workbench (SSTV decode)
│ ├── planboard/ # Evidence board
│ ├── regional_map/ # Area map (Michelin style)
│ ├── videocall/ # Video conference with allies
│ ├── garden/ # Backyard + car
│ ├── garden_back/ # Back garden
│ ├── car_discovery/ # Volvo discovery
│ ├── usb_discovery/ # USB find sequence
│ ├── driving/ # Night drive transitions
│ ├── driving_day/ # Daytime drive transitions
│ ├── klooster/ # USB dead drop
│ ├── dwingeloo/ # Dwingeloo Observatory
│ ├── westerbork_memorial/ # Westerbork memorial
│ ├── astron/ # ASTRON campus
│ ├── lofar/ # LOFAR station
│ ├── hackerspace/ # Hackerspace Drenthe
│ ├── hackerspace_classroom/ # Hackerspace workshop
│ ├── drone_hunt/ # Drone neutralisation puzzle
│ ├── facility/ # Infiltration exterior ⚠️
│ ├── facility_interior/ # Stealth corridors
│ ├── laser_corridor/ # Laser-grid stealth puzzle
│ ├── facility_server/ # Climax scene 🎯
│ ├── long_night/ # Post-infiltration night
│ ├── debrief/ # Aftermath
│ ├── return_to_max/ # Coming home
│ ├── morning_after/ # Next morning
│ ├── epilogue/ # Three months later
│ └── credits/ # End credits
├── assets/
│ ├── images/
│ │ ├── scenes/ # SVG backgrounds (~10 MB)
│ │ ├── icons/ # UI icons and inventory items
│ │ ├── evidence/ # Documents, photos for evidence viewer
│ │ └── characters/ # Character portraits
│ ├── audio/ # Sound effects (future)
│ └── fonts/ # Custom fonts
└── docs/ # Documentation
├── PROJECT_OVERVIEW.md # Complete overview
├── SECURITY_AUDIT.md # Security audit report
├── TECHNICAL_REFERENCE.md # Engine + systems reference
├── FLOW_ANALYSIS.md # Scene flow QA report
├── SCENES.md # Scene catalog (34 scenes)
├── STORY.md # Full screenplay
└── ...
- Compascuum (52.81°N, 6.97°E) - Ryan's farmhouse (home base)
- Ter Apel (52.9°N, 7.1°E) - Medieval monastery (dead drop)
- LOFAR Station (52.91°N, 6.50°E) - Radio telescope array
- WSRT (52.9°N, 6.6°E) - Westerbork telescope (historic)
- Steckerdoser Heide (53.3°N, 7.4°E) - Military R&D facility (target)
- Meppen (52.69°N, 7.29°E) - Border town
All locations use real GPS coordinates and are accurately mapped!
- SSTV (Slow Scan Television) - Radio image transmission
- HackRF One - Software-defined radio (1 MHz - 6 GHz)
- Flipper Zero - RF/NFC/IR multi-tool for security research
- Meshtastic - Off-grid encrypted mesh network
- LOFAR - Low-frequency radio telescope array (real!)
- Bluetooth - Wireless protocol invented by Jaap Haartsen (real person!)
- ROT1 Cipher - Simple Caesar cipher (plot point: intentionally weak)
- Password cracking - Multiple password puzzles
- Stealth sequences - Timing-based infiltration
- Evidence analysis - Connect clues detective-style
This game is inspired by real events and technologies:
✅ LOFAR - Real radio telescope array in Netherlands (ASTRON)
✅ WSRT - Westerbork telescope, historic astronomy site
✅ Bluetooth - Jaap Haartsen is the actual inventor
✅ Steckerdoser Heide - Real area in Germany near Meppen
✅ Reichsbürger Plot - 2022 coup attempt in Germany (documented)
✅ Russian Influence Ops - Inspired by documented operations
🔧 Project Echo - Fictional RF weapon (based on real EMP research)
🔧 Operation ZERFALL - Fictional operation (plausible scenario)
Disclaimer: This is a work of fiction. While inspired by real technologies and events, all characters and incidents are fictional. This game is entertainment, not a guide for illegal activities.
| Browser | Version | Status |
|---|---|---|
| Chrome/Edge | 80+ | ✅ Excellent |
| Firefox | 75+ | ✅ Excellent |
| Safari | 13+ | ✅ Good |
| Mobile Chrome | 80+ | ✅ Excellent |
| iOS Safari | 13+ | ✅ Good |
Recommended: Modern browsers from 2020+
| Category | Count | Details |
|---|---|---|
| Total Files | 80+ | HTML, JS, SVG, Docs |
| Lines of Code | 27,500+ | Engine + Scenes |
| Documentation | 200+ pages | 7+ markdown files |
| Scenes | 33 | Fully implemented |
| Hotspots | 250+ | Interactive elements |
| Dialogue Lines | 2,000+ | All characters |
| Evidence Docs | 40+ | Emails, PDFs, images |
| Quests | 20+ | Main and side quests |
| Puzzles | 5+ | Varied difficulty |
Version 1.3 - Production Ready ✅
- ✅ Complete story (20 parts + epilogue)
- ✅ 33 scenes fully implemented
- ✅ All core systems functional (dialogue, inventory, quests, evidence, puzzles)
- ✅ Evidence viewer with multiple document types
- ✅ Password puzzle system with ROT1 decoder
- ✅ Chat interface (Signal-style encrypted messaging)
- ✅ Investigation board (detective cork board)
- ✅ Regional map (Michelin paper map style, accurate GPS)
- ✅ Voice narration (optional, Web Speech API)
- ✅ Mobile support (touch controls)
- ✅ Save/load system (localStorage, format v2)
- ✅ Pause system (P key, menu button)
- ✅ Scene-based clock (SCENE_TIME_MAP)
- ✅ 200+ pages of documentation
- ⏳ Achievement system
- ⏳ Multiple save slots (3-5)
- ⏳ Statistics tracking
- ⏳ Progressive hint system
- ⏳ Accessibility mode (skip puzzles)
- ⏳ Dutch translation
- ⏳ German translation
Contributions welcome! See PROJECT_OVERVIEW.md for detailed guidelines.
Ways to contribute:
- 🐛 Bug reports and testing
- 🌍 Translations (Dutch, German, other languages)
- 🎨 New scenes or assets (SVG backgrounds, icons)
- 🎵 Audio (sound effects, music)
- 📝 Documentation improvements
- 💻 Code improvements (engine, systems)
git clone https://github.com/ReinVelt/CyberQuest.git
cd CyberQuest
# No build process! Just open index.html
open index.html
# Or use local server:
python -m http.server 8000CyberQuest collects no personal data. Full stop.
- All save data (progress, flags, inventory) is stored only on your own device using the browser's
localStorageAPI. - Nothing is transmitted to any server — there is no back-end, no analytics, no tracking.
- No advertisements. None. Ever.
- No Google Analytics, no Matomo, no tracking pixels, no beacon calls.
- No third-party scripts of any kind — no CDN-loaded libraries, no social widgets, no chat bots.
- No dark patterns — no cookie banners, consent popups, newsletter nags, or manipulative UI.
- No accounts, no sign-up, no cookies (beyond
localStoragefor your own save). - The entire game is plain HTML + CSS + JavaScript + images. What you download is what runs.
- Clearing your browser's
localStoragewill erase your save. That is the only data that exists.
CC BY-SA 4.0 — see LICENSE for full terms.
You must credit Rein Velt and share derivatives under the same license.
Rein Velt
Development: 2025-2026
Version: 1.1
- Web Speech API (W3C Standard)
- SVG (W3C Standard)
- localStorage API (W3C Standard)
- ASTRON - LOFAR information
- TU Eindhoven - Antenna research
- Bluetooth SIG - Protocol history
- Security research community
- Beta testers
- Drenthe wireless technology pioneers
- Reichsbürger coup plot (2022)
- Documented Russian influence operations
- Modern hacking tools and techniques
Documentation: See docs/ folder for comprehensive guides
Start Here: PROJECT_OVERVIEW.md
Issues: GitHub Issues
Discussions: GitHub Discussions
v1.3 (March 21, 2026) - Interactive Movie & Story Polish
- Interactive Movie button on title screen (one-click full-story playthrough)
- Movie mode: voice auto-enabled, pause button removed, dialog timing fixed
- Sitmower scene added (garden-path interlude before WSRT parking)
- USB dead-drop relocated from car boot to monastery bench (Klooster 23:03)
- Klooster bench hotspot + Eva Meshtastic clue via chat
- New SVG artwork for USB/car discovery scenes
- Audio asset files (MP3/OGG/WAV) removed from repository
v1.2 (March 7, 2026) - Production Polish
- 179/179 unit tests passing
- Fixed
_storagenull-injection bug in engine dependency injection - Production console.log suppression on non-localhost deployments
- Removed debug files from build; all cache-busters bumped to v=7
- CC BY-SA 4.0 license added; README links and placeholders resolved
v1.1 (February 27, 2026) - Expanded Release
- Expanded to 33 scenes (15 new scenes)
- Pause system, scene-based clock, save format v2
- Hackerspace, ASTRON, LOFAR, Westerbork scenes
- Laser corridor, drone hunt, long night, return to Max, morning after
- Engine line count: 1490 → 2704
v1.0 (February 15, 2026) - Production Release
- Complete game (18 scenes, 20 story parts + epilogue)
- All systems implemented and tested
- 200+ pages of documentation
- Mobile support, voice narration, save/load
- 📘 Start Here: Project Overview - Complete overview, FAQ
- 🔧 Technical Reference - Engine + systems docs
- 🤝 Contributing - Scene checklist, code style, story rules
- 🗺️ Scene Catalog - All 34 scenes detailed
- 📖 Full Story - Complete screenplay
CyberQuest: Operation ZERFALL
A techno-thriller adventure built with curiosity, code, and coffee.
Genre: Point-and-Click Adventure / Techno-Thriller
Platform: Web Browser (Desktop & Mobile)
Status: v1.3 Production Ready ✅
Playtime: 2-4 hours
"When strange signals appear, investigate. But don't do it alone." — Ryan Weylant