DoomOS: a bare-metal x86 hobby OS that boots straight into Doom

A 32-bit x86 hobby operating system with one job: boot a PC directly into Doom, with no Linux, DOS or external runtime underneath. A custom 16-bit MBR bootloader switches to VGA Mode 13h (320x200, 256 colors), enables A20, loads the kernel and the shareware WAD into extended memory via unreal mode, then jumps to protected mode. The kernel brings its own PS/2 keyboard driver, PIT/TSC timing and a minimal freestanding libc that serves doom1.wad from RAM. The engine is doomgeneric. The README says the codebase was built entirely with Kimi K3, in partnership with KIMI. Runs in QEMU (make run).

CGdoom: Doom on Casio Prizm graphing calculators

Doom for Casio Prizm graphing calculators. Made for the fx-CG20 and reported working on the fx-CG50.

Freedoom on AWS Lambda MicroVMs and Amazon Bedrock AgentCore

Freedoom running on AWS cloud compute and played in a web browser. Two projects run the game engine inside an AWS Lambda MicroVM and an Amazon Bedrock AgentCore Runtime session. Each game gets its own isolated microVM. The engine’s frames and sound are streamed to the browser over a WebSocket, and key presses are sent back.

GDOOM - Doom on garmin watch

Doom in Fortnite

A recreation of classic Doom inside Fortnite, built using Unreal Editor for Fortnite (UEFN). The demonstration combines Doom-style visuals with Fortnite’s building mechanics. Created as a learning exercise, the project recreates Doom’s appearance within Fortnite’s engine rather than running the original Doom engine.

Fellow Espresso Series 1

Doom running on the circular display of a Fellow Espresso Series 1 espresso machine, demonstrated by Reddit user FullExtraction. The machine’s existing controls are used to play: the scroll wheel turns the player, the brew button moves forward, and the steam button fires. According to the creator, dying returns the machine to its regular firmware. A follow-up demonstration shows the whole machine and an updated display layout adapted to its circular screen.

Doom on FABA+

Doom runs on FABA+, a screen-free interactive audio player designed for children. Originally built to play stories, songs, and educational content using collectible characters, the device has been repurposed to run the classic first-person shooter.

DOOM on Ethereum Virtual Machine (EVM)

A port of the original DOOM engine to Solidity, executing gameplay and software rendering entirely inside the Ethereum Virtual Machine. Runs on local Anvil with relaxed execution limits. Supports Freedoom, Ultimate DOOM, and DOOM II, with nine verified Episode One map completions. Interactive gameplay runs at approximately 0.55 FPS on an Apple M3 Pro.

Doom on Sonoff Basic R2

Doom-style FPS that runs on the Sonoff itself (engine, map, imps, doors, weapons) and is played from the device browser

Microsoft Dynamics 365 Business Central DOOM (ERP System)

DOOM running in Microsoft Dynamics 365 Business Central ERP Systemd - All code is translated into AL (Application Language)