Call of Duty Zombies in the Browser: What Those Ports Are

You can play Call of Duty zombies in a browser tab in October 2026, and the projects behind it are fan-made, unofficial and not all the same kind of thing. One is a port built on decompiled Black Ops engine code, running at vel.gg. Others are Three.js reconstructions that rebuild a map from scratch in JavaScript. A third group is custom zombies maps, built by modders for the same browser engine.

Knowing which one you are looking at explains why one plays like Black Ops and another feels like a fan game, and why some of them vanished within days.

What went viral in October 2026

The wave started with Black Ops 1 zombies. Game Rant reported that the mode was playable free in an up-to-date browser at vel.gg/bo1z, with all Zombies DLC and a "Hell Mode" option that drops you on the last floor of a map. The port covers the zombies mode, not Black Ops multiplayer.

Around the same time, developer Luckey Faraday published browser versions of Kino der Toten and a Black Ops 2 multiplayer recreation called Claude of Duty: Vibe Slops II. TechPowerUp reported that both ran on Three.js and were built with the help of AI coding agents, and that Activision sent a DMCA takedown which took the hosted games offline. Faraday announced it on X.

So the timeline is short: the ports appeared in early October, went viral, and part of the wave was gone by October 9 to 11. The vel.gg port was still up when this was written.

The vel.gg Black Ops zombies port

This is the one people mean when they say "Black Ops zombies in the browser". It runs at vel.gg, and the Call of Duty: Black Ops Zombies game page tracks it.

The setup screen is simple: a name, single player or multiplayer, classic Black Ops guns or Counter-Strike guns, high or low graphics, then a map. Low graphics removes shadows and drops the resolution, which is the setting to use on a school laptop. The game also warns you if your browser is not using a graphics card.

The map list is the Black Ops 1 set: Kino der Toten, Five, Der Riese, Ascension, Moon, Shangri-La and the rest. The co-op mod's author says it covers all ten maps plus Hell mode, and Game Rant notes it can lag compared to the official release.

The engine side came from a project called bo1-zombies-decompiled, created on October 4, 2026, and described as "Decompiled engine code for Black Ops 1 Zombies, so mods can change the engine itself, not just scripts and maps." That is the difference between this and a remake: the game logic comes from decompiled Black Ops code, not an approximation of it.

Co-op in the browser

The port launched as solo only. A developer called AllanLotta built a Chrome extension that adds co-op for up to four players: one person hosts, sends a link, and everyone spawns together. It adds a lobby with names, status and ping, and it works without port forwarding.

Two things are worth knowing. The author says full four-player lobbies are the least tested part, and that the extension only adds co-op on top of the site, without hosting or including game files. It is still a browser extension from an individual developer, so install it only if you accept that trade.

The Three.js reconstructions

Luckey Faraday's projects take a different route. Instead of running the original engine, they rebuild the map in JavaScript with the Three.js rendering library. TechPowerUp describes both as Three.js projects built with the help of AI coding agents.

Kino der Toten was the zombies side, and Claude of Duty: Vibe Slops II was the multiplayer side: free-for-all against six bots on Hijacked and Nuketown 2025. According to TechPowerUp, the project pages stated that their maps, models and animations were exported from the original PC games. That is exactly the detail that makes a takedown easy to justify, even with both projects labelled non-commercial.

The hosted versions are offline now, and the GitHub repository is gone as well, so the write-ups and news coverage are what remain.

Port or remake? How to tell in ten seconds

A port runs the original game's engine code on a new platform. It feels like the real game because it is the real game logic: same perks, same zombie pathing, same mystery box odds. The vel.gg project is in this family.

A remake or reconstruction writes new code that imitates the game. It can look convincing in a clip and feel wrong when you play, because physics, animation blending and AI are all someone's approximation. The Three.js projects are in this family.

A custom map is a new level built for an existing engine, like the custom zombies maps listed alongside these projects. These are usually the safest fan content, because they add a level rather than rehosting a campaign.

There is a quick test. If a site asks you to load files from your own copy of the game, it is probably a port. If it starts with no files and no account, it is probably a remake, and remakes are the kind most likely to run into a takedown.

How to play without getting burned

• Use a desktop browser with hardware acceleration on. Chrome or Edge on a laptop is the normal setup. The game itself tells you if graphics acceleration is off.
• Expect a download on first load. A browser port has to fetch engine and map data before the first round.
• Do not install "launchers" or "unlockers". The game runs in the tab. A download that promises more is a red flag.
• Ignore fake play buttons. Game sites are full of them. The real game starts inside the page, usually after a click to capture the mouse.
• Never enter a password. None of these projects need an account. If one asks, close it.
• Check the link before you share it. Takedowns mean old links rot, and dead domains get picked up by ad pages. That is why the Black Ops Zombies page is a safer link to send a friend than a random short URL.

What about Black Ops 2 and Modern Warfare 2?

Black Ops 2 zombies has its own browser project at zombies.mdelworkstation.cc, with solo and party modes, difficulty options, and keyboard, controller and touch controls. It is listed in the catalogue as Black Ops 2 Zombies, and it is a separate project from the vel.gg port.

The same October wave also produced browser Modern Warfare 2 multiplayer. MW2 is a browser remake with matchmaking, private matches, bots and killstreaks up to the tactical nuke, and it downloads its game files before your first match.

Why some of them disappear

Call of Duty is Activision's property, and the company has shown it will send takedowns. That is the risk every fan port runs, whether it is a decompiled engine or a Three.js rebuild. Projects that require your own game files keep the original content out of the download, which is the usual line fan ports try to hold. Projects that ship exported maps and models are on much weaker ground.

This is not legal advice, just the pattern: the closer a project sits to the original assets, the shorter its life tends to be. Rights holders who want a listing removed can use the site's takedown page.

What to expect next

The tooling that made these ports possible is not going away. Polygon describes a moment where a new Claude version lets modders decompile games far faster than before. Expect more Call of Duty projects, more takedowns, and more attempts to stay up by shipping engine code and asking you for the files.

For players, the practical advice is boring and useful: use checked links, keep your browser updated, do not download anything that is not the game, and play the versions that are up while they are up.