Chocolate Doom by Simon Howard and contributors, based on DOOM by id Software; Cloudflare WebAssembly port by Celso Martinho and contributors. GPL-2.0-or-later where stated in source headers; see LICENSE and AUTHORS.md.
Browser Games Now modifications, 2026-10-20: Emscripten 3.1.57 build flags, immediate native menu and sync native save files to IndexedDB after rename. Wrapper is GPL-2.0-or-later.
SDL 2.28.4, SDL_mixer 2.8.0, SDL_net version_2: zlib, included licenses and complete source ZIPs. Mixer additional codec formats are disabled. Emscripten: MIT/University of Illinois/NCSA, EMSCRIPTEN-LICENSE.txt. Chocolate Doom source includes OPL/PCSOUND and their original license notices.
No original DOOM WAD, maps, sprites, sound, music or executable is distributed. Player supplies doom1.wad locally. Desktop solo only, English game, sound effects only; no multiplayer service.