Cloudflare Chocolate Doom, Browser Games Now local-file player, 2026-10-20
Source: https://github.com/cloudflare/doom-wasm/tree/65e0d3ae2ffa604155eebd96ed40da6567bd08f4
Emscripten 3.1.57, autoconf 2.73 and automake 1.19.
Repository: source emsdk_env.sh; python3 scripts/prepare-doom.py
Verified downloads are reused from /tmp/bgn-doom. No WAD is fetched.

Standalone: tar xzf doom-source.tar.gz; cd doom-wasm
The source archive has engine.patch changes applied. Do not apply it twice.
emconfigure autoreconf -fiv
CFLAGS=-std=gnu11 ac_cv_exeext=.html emconfigure ./configure --host=wasm32-unknown-emscripten --without-libsamplerate --without-libpng --disable-doc --disable-fonts --disable-icons --disable-bash-completion
emmake make -j8
Copy src/websockets-doom.js and .wasm beside the supplied index.html/boot.js/messages.js.
The SDL source ZIPs can be placed in $EM_CACHE/ports for offline SDK builds.
Wrapper preferred source is boot.js, messages.js and index.html. Serve over HTTP(S).

Only local doom1.wad is accepted; its SHA-256 separates native save slots under
/bgn-doom-v1/<hash>. The WAD stays in MEMFS and is not stored in IndexedDB.
IDBFS is restored before main starts. G_DoSaveGame syncs after the native rename.
Wait for the browser save confirmation; reselect the same WAD after refresh,
then use Load Game. Native saves are origin/profile-specific.
Acceptance scope: DOOM shareware E1M1, English, desktop keyboard, solo, SFX.
Retail, DOOM II, PWAD mods, music, touch controls and multiplayer are unverified.