BO1 Zombies (vel.gg)

BO1 Zombies at vel.gg is an unofficial browser version of the Zombies mode from Call of Duty: Black Ops (2010). It runs in a desktop browser tab with WebAssembly and downloads each map’s data from the site, so you do not need your own game files. When we checked on 2026-10-17 the site loaded normally.

The site does not name its creator. Its engine files are named KisakBlack-web, which points to KisakBlack, an open-source (GPL-3.0) reimplementation of the Black Ops executable by SwagSoftware. The KisakBlack repository itself only covers a Windows build that needs a Steam copy of the game, and it does not mention a web version.

What it can do

• Ten maps: Nacht der Untoten, Verrückt, Shi No Numa, Der Riese, Kino der Toten, Five, Ascension, Call of the Dead, Shangri-La and Moon, picked from a copy of the game’s own map-select screen.
• Single player or Multiplayer: the first screen asks for a player name, then single player or “Create a lobby, invite friends”.
• Gun sets: the original Black Ops guns, or an optional Counter-Strike 2 style set (guns, recoil and movement) on supported maps.
• Hell mode (Classic guns only, not on every map): the site describes it as starting on round 100 with up to 300 zombies at once and no perk machines.
• Options: mouse sensitivity, master volume and fullscreen.

How to play

1. Open vel.gg/bo1z in a current desktop browser such as Chrome or Edge.
2. Enter a name, choose single player or a lobby, and pick a gun set.
3. Pick a map. The first visit to each map downloads its data and stores it in your browser, so it can take a while.
4. Press a key to start, then click the game to capture the mouse.

Requirements

• A desktop browser with hardware acceleration switched on.
• Free browser storage: the site warns when a map needs more space than the browser allows.
• Keyboard and mouse, or a controller (the site includes gamepad support).

Controls

The site does not publish a full key list. Two things it does point out: crouch is Ctrl, and because Ctrl+W closes a browser tab, it suggests turning on Fullscreen in Options so browser shortcuts go to the game. Tab shows a zombie counter when that option is on.

Is it safe and legal?

• It is an unofficial fan project. Call of Duty belongs to Activision, which has not endorsed it, and it could be taken offline at any time.
• You do not install anything; the game runs in the browser tab and keeps its downloads in site storage.
• We only link the site itself.

Not working?

• Very low frame rate: turn on hardware acceleration in your browser settings, or try another browser.
• “Browser storage is full”: free some disk space or clear unused site data, then retry. Partial downloads resume.
• The mouse does not aim: click the game window to capture the mouse again.
• Engine stopped: reload the page; the site keeps the verified download.

Unofficial. This page is written by an independent directory. It is not made by, endorsed by or affiliated with Activision or Not credited on the site (BO1 Zombies (vel.gg)'s author). We do not host any files, and we never link to game files, ROMs or ISOs.