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Image reference (original game): Minecraft: Java Edition · original-game artwork, provided by IGDB. Image rights remain with their respective owners. This illustrates the referenced original game, not the actual visuals of this rewrite or mod.

Source maintainer: DaffyDabz · Revision: 53659b7dc0c7 · Catalogued: 2026-10-12

Source license: Apache-2.0 · LICENSE · Article: Source README (format adapted)

The source README follows, with formatting adapted for this site and images replaced by source links. Feature, completion and testing claims belong to its authors and have not been independently playtested here. The Traditional Chinese translation was prepared with AI assistance.

bo2mc: Minecraft Zombies (Black Ops II zombies in a Minecraft world)

A Black Ops II Zombies round every night, Minecraft survival every day. You play the Black Ops II
character with Black Ops II guns, perks, points and HUD, in an endless Minecraft world. Built on
IW4L (a Rust rewrite of the IW4 engine) by joining two forks of it:
our Black Ops II Zombies rebuild (bo2zm) and chasmlol’s
2010 Rust Rewrite Mashup (the Minecraft world,
from MinecraftOSS).

Status: playable, work in progress · Latest release: 2026-10-08 · Last updated: 2026-10-08

Hobby/modding project. Nothing from Activision or Mojang is in this repository: Black Ops II’s files
come from your own copy of the game, Minecraft’s files are fetched from Mojang’s servers on first run.

Contents

Download and play

  1. Open this repository’s Releases page (right side of the GitHub page) and download the newest zip,
    MinecraftZombies-2026-10-08.zip (about 45 MB).
  2. Unzip it anywhere you like (for example Documents). Keep the files together in their folder.
  3. Double-click Setup.bat. It finds Black Ops II in your Steam libraries, writes the settings file (.env) and
    puts a Minecraft Zombies shortcut on your desktop. If it can’t find the game it asks you to paste the Black
    Ops II folder (the one holding zone).
  4. Open Minecraft Zombies (or Play.bat) > ONLINE > SOLO > pick MINECRAFT on the globe > START MATCH.
    NUKETOWN sits next to it on the same globe for plain Black Ops II Nuketown Zombies.

Updating from an older zip: unzip the new one over the old folder (or into a new folder and run Setup.bat again).
Your settings live in iw4l-artifacts\ next to iw4l.exe.

The first Minecraft game downloads Minecraft’s own files from Mojang (about 125 MB, once). Windows SmartScreen may
warn about an unknown program the first time; choose More info > Run anyway.

You need your own Black Ops II (PC, Steam) with Zombies. The zip holds only this mod (iw4l.exe, the loading
picture, the setup script, the license); no Black Ops II or Minecraft files. Tested on the author’s PC only, not yet
on a fresh PC.

Controls

Key Does
W A S D, Space Move, jump (crouch, sprint and the rest are Black Ops II’s own binds)
Left click Shoot, or mine the block you look at (hold)
Right click Aim, or place the block in your hand
Mouse wheel, 1-9 Pick a hotbar slot (guns, grenades, knife, blocks, tools, food)
E Inventory (crafting, armor, furnace and chest when you open one)
F Use: doors, perk machines, the Mystery Box, wall chalks, putting window glass back
T Minecraft’s chat; / opens it with a command started
Esc Pause menu (End Game, Exit Game back to the menus)

Chat commands

Press T (or /) and type. /help lists them in the game.

Command Does
/round <1-255> Jump to that round (between rounds it starts at once)
/points , /points set Give points, or set them
/time set <day|noon|night|midnight|ticks> Move the clock; night between rounds starts the next round
/time add <ticks>, /time query <daytime|gametime|day> Minecraft’s own time commands
/gamemode <survival|creative|adventure|spectator> Creative flies on a double jump; spectator flies through blocks
/give <item> [count] Any Minecraft item, for example /give diamond_sword
/summon <mob> [x y z] A Minecraft mob, for example /summon creeper
/tp <x> <y> <z> Teleport (~ means where you stand)
/kill, /kill @e Kill yourself; kill every Minecraft mob within 64 blocks
/seed Show this world’s seed

How it plays

  • The game starts at night, in the spawn room, round 1, with Black Ops II’s pistol and knife (no free grenades: buy
    them at the chalk).
  • Every night is one zombies round. The sun stops at midnight until the last zombie of the round dies,
    then the day comes.
  • Every day is Minecraft: mine, farm, place blocks, build walls around yourself. Only animals by day.
  • At night Minecraft’s monsters spawn too and hunt you like the zombies do: they know where you are within
    48 blocks, seen or not. Daylight burns them. A Minecraft mob that dies falls over as a ragdoll before it poofs.
  • The spawn room can’t be broken. It holds the perk machines and the Mystery Box (one spot, it never moves; the
    Minecraft compass at the top right of the screen points at it). Zombies can’t break its doors: they come in
    through two glass windows, smashing the panes one by one. Hold Use at a window to put the glass back (+10 points
    a pane), like Black Ops II’s boards.
  • Wall weapons are chalk drawings, each with a Minecraft sign above it giving the name and price: four inside
    the house, eight on its outside end walls (guns, the Bowie Knife, Galvaknuckles, Semtex, frag grenades,
    claymores, bread).
  • The vault: a second room across the road, 3,000 points to open. It holds the Nether portal, the End portal
    (twelve Eyes of Ender light it), Pack-a-Punch, and the rare wall weapons, hung on the wall itself until they
    get chalk outlines: the Blundergat (10,000), the Spork (5,000, three times the knife) and the Golden Spork
    (15,000, kills in one hit). Signs mark what comes next (Hell’s Retriever, the Thunder Gun, more Mystery Boxes).
  • Every perk also works the Minecraft way: Speed Cola mines and places faster, Double Tap swings faster, Deadshot’s
    swings crit, Stamin-Up sprints without hunger, Quick Revive heals twice as fast, PhD Flopper takes no fall or
    creeper damage, Vulture Aid loots, Electric Cherry shocks the mobs too, Juggernog adds golden hearts.
  • Every 5th round is a souls round, like Nacht der Untoten’s dog rounds: no zombies, just hellhounds that arrive on
    Minecraft lightning bolts and a pack of angry Minecraft wolves, in thick fog; the last one drops Max Ammo and the
    fog lifts.
  • Swimming works like Minecraft: slower in water, you sink slowly, Jump swims up, Crouch dives; Jump and Forward at
    the surface climbs out. Stay under too long and you drown.
  • Nether and End: zombie rounds keep going there; Nether zombies drop blaze rods, Eyes of Ender lead to the End.
  • Zombies rise from the ground around you and break any block to reach you, natural ground too. Blocks
    have health by their Minecraft hardness: leaves and dirt go fast, wood and stone slower, iron and obsidian
    hold for a long time, bedrock never breaks. Zombies go through the weakest way in. A
    zombie that digs too long, gets stuck or falls behind rises again closer to you. Zombies drop rotten flesh and
    bones; Minecraft swords and tools hurt them by their attack damage.
  • Underground when night falls: they rise right on top of you. A warning comes at sunset.
  • Going down works like Black Ops II: Quick Revive (solo) brings you back, otherwise game over and a
    new random world starts at round 1. Every game is a new world. Dying in the day ends the game too.
  • Carpenter gives you wood (planks and doors).
  • Survival items: Black Ops II guns, grenades and the knife are inventory items; you start with wooden tools; hearts
    and hunger replace Black Ops II health; armor, furnace and chest work; ammo station in the room; grenades and
    claymores are bought from wall chalk, monkey bombs come from the box (3 per hit, stacking).
  • Black Ops II’s own menus: the globe shows MINECRAFT next to NUKETOWN, so both maps are one click apart; Exit Game
    returns to the menus.

Requirements

  • Windows 10/11, a GPU with DirectX 12 (or Vulkan).
  • Call of Duty: Black Ops II (PC, Steam) with Zombies installed: the game reads its zone files.
  • Internet once, the first time (Minecraft’s files, about 125 MB, from Mojang).
  • To build: Rust (stable, MSVC), about 30 GB free for the build folder.

Build from source

The release zip above is the easy way. To build it yourself:

  1. Install Rust (stable, MSVC toolchain) and clone this repository.
  2. Build: cargo build -p launcher --profile play (set CARGO_TARGET_DIR to a roomy drive).
  3. Make a play folder and copy target/play/iw4l.exe into it.
  4. In the play folder, create .env:
    IW4L_GAMES="<your Steam library>/steamapps/common/Call of Duty Black Ops II"
IW4L_BO2MC=1
IW4L_SKATE=off
WGPU_BACKEND=dx12
  5. From the play folder: iw4l.exe frontend t6:zm_nuked opens Black Ops II’s own main menu (ONLINE > SOLO >
    MINECRAFT > START MATCH). iw4l.exe map t6:zm_nuked skips the menu.

Settings, caches, logs and demos go to iw4l-artifacts\ next to iw4l.exe.

Configuration

Lines in the play folder’s .env:

  • IW4L_MINECRAFT_SEED: a fixed world (same seed = same world every game). Without it every game is a new world.
  • IW4L_MINECRAFT_TIME: start time of day (default nightfall, 13000).
  • IW4L_BO2MC_RAGDOLL=0: Minecraft mobs poof at once instead of falling over.
  • IW4L_BO2MC_DAY_SPEED: day clock multiplier (testing).
  • Settings (resolution, volume, sensitivity) live in the play folder’s iw4l-artifacts/settings.cfg.

How it works

  • The game loads Black Ops II’s Nuketown Zombies for its guns, zombies, perks, box, HUD and scripts, hides
    Nuketown’s world, and stands it on a Minecraft world with block collision (the mashup’s trick, with a
    Black Ops II map instead of an MW2 one).
  • crates/sim/src/bo2mc.rs is the bridge between the Minecraft world (blocks, day clock, room, spawn spots)
    and the Black Ops II rules (zombies, rounds, perks, points).
  • crates/render_anim/src/minecraft_world/bo2mc_world.rs builds the spawn room and the vault, runs the day clock,
    and carries out the chat commands (bo2mc_world/chat.rs).
  • Zombies plan over the blocks with A* (walk, climb one block, drop, dig through blocks), claw doors and
    blocks, and rise again closer when stuck or far.
  • Rounds follow the day clock: a round waits for nightfall, the clock waits for the round.
  • Minecraft’s mobs, items and crafting run on MinecraftOSS (third_party/minecraftoss) on their own server thread;
    Black Ops II weapons and perks reach them through events (shots, Electric Cherry, Vulture Aid).

Coming soon

  • [ ] Ray gun bolts and explosions (grenades, claymores) hurt Minecraft mobs.
  • [ ] No way to dig up into the vault from below.
  • [ ] No hostile Minecraft mobs spawning in the day (stops the cave monsters digging up at you).
  • [ ] Chalk outlines for the Blundergat and both Sporks (they hang on the wall for now).
  • [ ] Hell’s Retriever (the Mob of the Dead tomahawk) in the vault.
  • [ ] The Thunder Gun (Black Ops 1) in the vault.
  • [ ] Mob of the Dead and Origins Mystery Boxes in the vault.
  • [ ] A fresh-PC install test of the release zip.

Recent changes

  • 2026-10-08: release zip MinecraftZombies-2026-10-08.zip with everything below; README rewritten (download,
    controls, chat commands).
  • 2026-10-08: chat commands for zombies: /round <1-255> jumps to that round (between rounds it starts at once),
    /points and /points set ; /time set night between rounds now starts the next round at once.
  • 2026-10-08: playtest fixes: no invisible walls at spawn (the parked bus is solid only as its own body, so its
    doors work, and Nuketown’s hidden patch walls are gone from the block world); perk machines show behind glass,
    not on top of it; the mouse stays in the game window; bread on the wall (12 for 100 points); a Minecraft
    compass at the top right points at the Mystery Box (all 32 needle positions); no leaf litter.
  • 2026-10-08: mob ragdolls: a Minecraft mob that dies falls over as a ragdoll (four-legged mobs roll onto their
    side, legs out) and lies about 5 seconds before it poofs; IW4L_BO2MC_RAGDOLL=0 turns them off. The chat
    also has /summon <mob> [x y z] and /kill @e.
  • 2026-10-08: polish pass: every perk also works the Minecraft way (Speed Cola mines and places faster, Double
    Tap swings faster, Deadshot’s swings crit, Stamin-Up sprints without hunger, Quick Revive heals twice as fast,
    PhD Flopper takes no fall or creeper damage, Vulture Aid loots, Electric Cherry shocks the mobs too); every wall
    chalk and buyable checked; Pack-a-Punched dual-wield guns get both clips; Minecraft’s chat on T with /gamemode
    (creative flight on a double jump, spectator flies through blocks), /time, /give, /tp, /kill, /seed and /help.
  • 2026-10-08: playtest fixes: the bus has its front back (the driver sits behind the windscreen, no walking
    through the hood); zombies drop rotten flesh and bones; Minecraft swords and tools hurt the zombies by their
    attack damage; Minecraft mobs hit you again; a tool’s crack goes as soon as you stop mining (bullet cracks
    still fade); the house doors are double doors you walk straight through; End Game ends the game.
  • 2026-10-08: the Minecraft loading picture is back (BO2’s Nuketown picture had replaced it).
  • 2026-10-07: the vault’s Spork (5,000) next to the Golden Spork (15,000); the vault weapons hang on its wall;
    frag grenades buyable again; the Blundergat and Sporks show their name and price.
  • 2026-10-07: the vault across the road (3,000 points: both portals, Pack-a-Punch, Blundergat, Golden Spork);
    a Minecraft sign with name and price over every wall weapon; chalks moved off the windows and perks;
    glass windows that smash; frag grenades on the wall.
  • 2026-10-07: grenades, claymores and monkey bombs are items you buy: grenades and claymores from wall chalk
    (claymores sell again once used up), monkey bombs from the box, 3 per hit, stacking; souls-round wolves die on
    lightning when the round ends; the End portal shows its starfield.
  • 2026-10-07: boarded windows into the spawn room (zombies tear boards off, you nail them back); the doors now
    hold; souls round every 5 rounds with Minecraft lightning, hellhounds and wolves; swimming; endless rounds in the
    Nether and End.
  • 2026-10-07: a new world every game; animals by day, hunting monsters at night; farming (hoe, seeds, bone meal,
    saplings that need soil); snow breaks like Minecraft’s and tools no longer place into it; blocks have their own
    health; Nuketown Zombies’ current menus, zombies and weapons merged in.
  • 2026-10-05: release zip with one-click setup (finds Black Ops II, makes the desktop shortcut).
  • 2026-10-05: Black Ops II’s front end with MINECRAFT next to NUKETOWN on the globe; new loading screen; Exit Game
    returns to the menus.
  • 2026-10-05: first-playtest fixes: doors you fit through, items for guns/grenades/knife, stacks, ammo station,
    real ammo, hearts and hunger, armor, furnace and chest.
  • 2026-10-05: first playable build: Minecraft world under Black Ops II zombies, spawn room, doors, digging
    zombies, night rounds, Carpenter wood.

Credits and license

Apache-2.0 (see LICENSE), as IW4L and the mashup it is built from.

  • IW4L by vladtrc and contributors (including Bulat Fatykh): the Rust engine everything runs on, https://github.com/vladtrc/iw4L
  • 2010 Rust Rewrite Mashup by chasmlol: the Minecraft world inside IW4L (block collision, terrain, day cycle), https://github.com/chasmlol/2010-rust-rewrite-mashup
  • MinecraftOSS: the Minecraft engine crates (world generation from a seed), vendored by the mashup in third_party/minecraftoss.
  • Black Ops II Zombies rebuild (bo2zm) and this mod by DaffyDabz.
  • Loading screen art: supplied by the author.
  • Call of Duty: Black Ops II belongs to Activision and Treyarch; Minecraft is a trademark of Mojang Studios / Microsoft.
    Fan project, not affiliated with or endorsed by any of them. You need your own copy of Black Ops II; Minecraft’s
    data files are downloaded from Mojang’s own servers on first run.

License and provenance

The README and its translation retain Apache-2.0 terms. Changes comprise translation, links and formatting. Editable Markdown, the original README, LICENSE and NOTICE files are included in the linked bundle. This grants no rights to the original games, their assets or trademarks.

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IW4L

Copyright 2026 vladtrc

IW4L was originally developed by vladtrc.
https://github.com/vladtrc/iw4L

IW4L is licensed under the Apache License, Version 2.0; see LICENSE.

2010 Rust Rewrite Mashup is a fork of IW4L by chasmlol that adds Skate 3's
skating and a Minecraft world to it.
https://github.com/chasmlol/2010-rust-rewrite-mashup

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Third-party material bundled with this repository
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Both fonts below are compiled into the IW4L binary with `include_bytes!`, so
they are redistributed with every build. Any archive that ships an IW4L binary
ships these two licence texts with it.

Oxanium (crates/ui/assets/Oxanium-Regular.ttf)
  Copyright 2019 The Oxanium Project Authors
  https://github.com/sevmeyer/oxanium
  SIL Open Font License 1.1 — full text in crates/ui/assets/OFL-Oxanium.txt

GNU FreeFont (crates/console/assets/FreeMono.otf)
  Copyright (C) 2002-2012 Free Software Foundation, Inc.
  https://www.gnu.org/software/freefont/
  GNU General Public License v3 or later, with the GNU font exception — full
  text in crates/console/assets/COPYING-FreeFont.txt. The exception is what
  makes embedding the font in an Apache-2.0 binary possible: a document or
  program that merely uses the font is not thereby covered by the GPL. The
  font itself is unmodified and remains under the GPL.

--------------------------------------------------------------------------------
Third-party source code
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No third-party source code is vendored in this repository, and the build links
no third-party project named below. IW4L's own dependencies are the crates
declared in Cargo.toml, under their own licences.

The fork carries two projects of its own author's in-tree, built as part of
the workspace:

skate/ — the Skate 3 skating engine and its data converter. It reads the
  player's own copy of Skate 3; no Skate 3 code or data is included.

third_party/minecraftoss/ — five crates of MinecraftOSS, a Rust Minecraft
  engine, copied from its commit 4013a68 (see its README). Its few data
  tables are gameplay values measured from Minecraft (food, waxing and
  dispenser rules). No Minecraft code, JARs, textures or sounds are included:
  the game downloads Minecraft's files from Mojang on first run.

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References consulted during development
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These projects were read while working out how the original games behave. They
are named here because the reading happened, not because anything of theirs is
distributed: none of them is vendored, linked, bundled or otherwise shipped.

OpenAssetTools — https://github.com/Laupetin/OpenAssetTools
  Open-source modding tools for older Call of Duty games. Its asset-structure
  headers document the on-disk layouts IW4L reads. Licensed under GPLv3.

oat (iw4x-x64 fork of OpenAssetTools) — https://github.com/iw4x-x64/oat
  The x64 fork, at revision 3a7442dee5ce040cfdb8da23fdb9fb525b5f743e, is the
  tree whose IW4MS headers were read for the 64-bit FastFile layouts.
  Licensed under GPLv3, like its upstream. No file in this repository is
  compiled against, generated from or distributed with those headers.

IW4x — https://github.com/iw4x/iw4x-client
  A custom client for Call of Duty: Modern Warfare 2 (2009), with dedicated
  servers, security fixes and modding support. Read as a cross-reference for
  asset and protocol behaviour, and by the fork for controller aim assist. Licensed under GPLv3.

KisakCOD — https://github.com/SwagSoftware/KisakCOD
  A Call of Duty 4 open-source reimplementation. Read as a cross-reference for
  engine structure, and by the fork for controller aim assist's defaults. IW4L targets IW4, so this is a neighbouring generation of
  the same engine family, not the same codebase.

Ghidra — https://github.com/NationalSecurityAgency/ghidra
  The software reverse engineering framework the original game binaries were
  read with. A development tool: none of it, and none of its output, is
  committed here or distributed with IW4L. Licensed under Apache 2.0.

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bo2zm fork
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This tree is bo2zm, a local fork of IW4L taken at upstream commit
11514ea37d1e80d75bf2c1ba332bbd68fac5db4e (2026-09-30) and extended to read
Call of Duty: Black Ops II (T6) PC files. Where the fork changes an upstream
file the change is marked "bo2zm"; the crates fastfile_t6 and bo2zm_tools and
the file crates/assets/src/lane/t6.rs are new. The fork stays under the Apache
License, Version 2.0.

OpenAssetTools (above) was also read for the Black Ops II zone layout: the
TAff0100 envelope and auth header, the XChunk streams, the public Salsa20 key
and its IV chain, the XFile blocks and the T6 asset list. It was read for
facts only; none of its code is copied here. Salsa20 is written from
D. J. Bernstein's specification and SHA-1 from FIPS 180-4.

The T6 zone walk (crates/fastfile_t6/src/walk_gen.rs) is generated by
crates/fastfile_t6/gen/t6gen.py, a development tool that reads layout and
load-rule facts from an OpenAssetTools checkout on the developer's machine
(the T6 structure declarations and the T6 zone-load rules) and writes Rust of
its own form. The checkout is not part of this repository, nothing from it is
vendored or linked, and the computed layouts were verified against the 32-bit
MSVC compiler.

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Game content
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No Call of Duty or Skate game data, and no Minecraft code or assets, are
contained in this repository or in any release archive. IW4L reads game data from a copy of the game the user already
owns and has installed. Call of Duty, Modern Warfare, Black Ops, related
trademarks and all original game assets belong to their respective owners.
IW4L is not affiliated with, endorsed by or supported by them.