HackerHotel 2020 Badge
A story-first challenge badge where the badge, hotel, terminal session, puzzles, and lore formed a mixed-reality escape room.
Badge.Team Adjacent Events
HackerHotel 2020
A challenge badge framed as a mixed-reality hotel escape room with story, puzzles, SAO, and field errata.
Garderen · Netherlands · 2020
Lifecycle
Add-ons & Upgrades
HackerHotel 2020 Badge
historical
3.3 V serial terminal game interface
The challenge used a 3.3 V USB-serial adapter on the SAO connector at 115200 8n1, with OS-specific Badge.Team guides for Linux, macOS, and Windows.
HackerHotel 2020 Badge
historical
CYBER SCARAB
Tilde Industries produced a CYBER SCARAB add-on for the HackerHotel 2020 challenge badge.
HackerHotel 2020 Badge
historical
Post-event mixed-reality workaround guide
Badge.Team published a post-event guide for completing the mixed-reality challenge without the original hotel props, magnetic maze, and badge-to-badge team formation.
Operational history
Issues & Camp Impact
HackerHotel 2020 Badge
major
The documentation warned not to let the badge front contact metal because exposed ground and protruding battery terminals could short and overheat batteries.
Users were told to remove batteries when storing the badge and to handle the exposed front carefully.
HackerHotel 2020 Badge
moderate
The SAO connector was placed on the bottom instead of the top, mirroring the connector relative to the SAO specification; LED-matrix pinout problems also required bodgewire rework.
Users wanting add-ons or full LED intensity needed rework guidance and sometimes volunteer help.
The troubleshooting section documented an unresponsive three-red-light state as EEPROM corruption and directed attendees to Badge.Team members for quick reprogramming.
The record captures both a failure mode and the on-site support workflow that kept the challenge playable.
The getting-started notes say USB-serial adapters and headphones were available only as needed, not in every badge bag.
The badge game depended on accessories that some attendees needed to borrow from the badge hacking area.
No HackerHotel 2020 badge image is published because the current Badge.Team source trail has not been paired with a reusable original badge photo or official upstream raster render with source URL, license or permission basis, attribution, and processing notes.
The record remains source-backed and image-free rather than copying Badge.Team page media, documentation screenshots, event photos, placeholders, or generated approximations.
Resources
HackerHotel 2020 Linux serial guide
connection guide · Badge.Team guide for connecting to the HackerHotel 2020 badge from Linux using a USB-serial adapter and Picocom.
HackerHotel 2020 Windows serial guide
connection guide · Badge.Team guide for connecting to the HackerHotel 2020 badge from Windows.
HackerHotel 2020 macOS serial guide
connection guide · Badge.Team guide for connecting to the HackerHotel 2020 badge from macOS with Picocom and common USB-serial devices.
HackerHotel 2020 docs
official docs · Badge.Team page documenting the mixed-reality escape-room badge, serial game flow, errata, SAO issue, LED rework, and Cyber Scarab add-on.
HackerHotel 2020 post-event play guide
post-event guide · Post-event guide for completing the mixed-reality challenge without the original hotel props and badge-to-badge setup.
Sources
Badge.Team: Connecting on Linux
Retrieved 2026-05-15 · Primary connection guide for the 3.3 V serial terminal workflow on Linux.
Badge.Team: Connecting on Mac
Retrieved 2026-05-15 · Primary connection guide for the 3.3 V serial terminal workflow on macOS.
Badge.Team: Connecting on Windows
Retrieved 2026-05-15 · Primary connection guide for the 3.3 V serial terminal workflow on Windows.
Badge.Team: HackerHotel 2020 docs
Retrieved 2026-05-15 · Badge.Team page documenting the mixed-reality escape-room badge, serial game flow, errata, SAO issue, LED rework, and Cyber Scarab add-on.
Badge.Team: Playing after the event
Retrieved 2026-05-15 · Primary post-event guide for mixed-reality puzzle workarounds and badge-to-badge challenge recovery.