Halo Combat Evolved browser port enables 128-player

A fan-made browser version of Halo: Combat Evolved delivers the full single-player campaign and multiplayer modes through a standard web browser. The port, created by Mitchell Hynes, uses mouse and keyboard controls mapped from the original Xbox Duke controller.

Mitchell Hynes said: "The browser version runs a port of the original game through a standard web browser rather than a console or traditional PC installation." Early hands-on reports indicate the campaign runs well in Google Chrome and closely matches the original 2001 Xbox release. The project moves the game from the tightly controlled original Xbox hardware to a different technical environment involving browser-based input, graphics, and networking.

Multiplayer scales to 128 players but faces reliability issues

The browser port includes a multiplayer mode supporting up to 128 players. This feature handles player movement, weapons, vehicles, and combat events across many connected clients. However, the multiplayer mode has been less reliable than the campaign. The 128-player feature is described as 'untested' and may have technical kinks. The port also includes split-screen co-op.

Project enabled by recent game decompilation

The port was made possible just days after Halo: Combat Evolved was decompiled. Decompilation reconstructs software into code that developers can inspect and modify. This process can enable new ports, performance improvements, expanded modding tools, and changes not possible through traditional fan patches. The decompilation has prompted discussion around uncapped frame rates, more extensive mods, and additional platform support.

Part of a growing trend in browser-based game preservation

Browser ports of older games have become more common in recent years. Fan-made browser versions have appeared for titles like Grand Theft Auto: Vice City, the original Diablo, and Half-Life. Beyond browsers, Super Mario Galaxy has been fully decompiled with a PC port in development. Work on the Nintendo DS title Kingdom Hearts 358/2 Days is also progressing toward a playable PC release.

The creator, Mitch, warned in a follow-up tweet that the browser port does not work well on iOS and Android. The legal status of these projects remains unclear. Decompilation and fan ports can raise copyright issues involving full commercial games. Companies like Microsoft, Nintendo, and Square Enix could challenge projects based on their games. The browser port is profit-free and may be shut down by Microsoft in the future, as the continued availability of such projects is not guaranteed.