DOOM (shareware Episode 1) in your browser.

Engine: doom-crt by Mattias Gustavsson, a minimal port of id Software's
DOOM source release, licensed under the GNU GPL v2 (see LICENSE.TXT).
Source code: https://github.com/mattiasgustavsson/doom-crt
(checked at commit 75331ac6adf21e1b036c1b470f457e96d82dd5d8)

This copy is the author's prebuilt WebAssembly page, downloaded from
https://mattiasgustavsson.com/wasm/doom-crt on 2026-10-12
(sha256 043430185d04ccb70615c90121449e554ffbfaf4eb0c2fd7c999539924878ac1),
with one added line: a Content-Security-Policy meta tag that blocks all
network access.

Game data: DOOM1.WAD v1.9 shareware (md5 f0cefca49926d00903cf57551d901abe),
(c) id Software, freely distributable shareware. Like it? Buy the full game.