GSC Tool

A utility to compile & decompile IW engine game scripts.

Supported Games

• IW5 (Call of Duty: Modern Warfare 3) PC PS3 Xbox 360
• IW6 (Call of Duty: Ghosts) PC PS3 PS4 Xbox 360 Xbox One
• IW7 (Call of Duty: Infinite Warfare) PC PS4 Xbox One
• IW8 (Call of Duty: Modern Warfare (2019) / Warzone) PC PS4 PS5 Xbox One Xbox Series X|S
• S1 (Call of Duty: Advanced Warfare) PC PS3 PS4 Xbox 360 Xbox One
• S2 (Call of Duty: WWII) PC PS4 Xbox One
• S4 (Call of Duty: Vanguard) PC PS4 PS5 Xbox One Xbox Series X|S
• H1 (Call of Duty: Modern Warfare Remastered) PC PS4 Xbox One
• H2 (Call of Duty: Modern Warfare 2 Campaign Remastered) PC PS4 PS5 Xbox One Xbox Series X|S
• T6 (Call of Duty: Black Ops II) PC
• T7 (Call of Duty: Black Ops III) *WIP*
• T8 (Call of Duty: Black Ops 4) *WIP*
• T9 (Call of Duty: Black Ops Cold War) *WIP*

Usage

./gsc-tool.exe <mode> <game> <path>

modes: asm, disasm, comp, decomp

• note: zonetool files (.cgsc, .cgsc.stack) use: zasm, zdisasm, zcomp, zdecomp modes

games: iw5, iw6, iw7, iw8, s1, s2, s4, h1, h2, t6

• note: PS3 & Xbox 360 use iw5c, iw6c, s1c games

paths: file, directory (recursive process all files inside the directory)

Example: ./gsc-tool.exe comp iw5 ./data/iw5/my_fancy_script.gsc

Mode	Description	Output
asm	assemble a file.gscasm	file.gscbin
disasm	dissasemble a file.gscbin	file.gscasm
comp	compile a file.gsc	file.gscbin
decomp	decompile a file.gscbin	file.gsc

File Format

If you need to extract scripts from fastfiles or game memory, use Zonetool or Jekyll.

• gsc-tool .gscbin format is a serialized ScriptFile struct:
  name: null-terminated string
  compressedLen: 4 byte uint
  len: 4 byte uint
  bytecodeLen: 4 byte uint
  buffer: byte array[compressedLen]
  bytecode: byte array[bytecodeLen]
  

note: for PS3 & Xbox 360 .gscbin files (compressedLen, len, bytecodeLen) are saved as little-endian!!

• zonetool (IW5) format made of bytecode file .cgsc and decompressed stack buffer .cgsc.stack.

• treyarch (T6) format is a single buffer with gscobj data .gsc or .csc.

Contribute

If you like my work, feel free to contribute! Would allow me to spend more time adding new features & fixing bugs.

BTC: bc1qky7x9kpjlt6nsvt7pckc3wwzk8rk9pgtnmw98u
ETH: 0x6261BBE1a33F6Fec4b722DbCe2c28B4CC02c9C7B

Credits

This project is based on RektInator's gsc-asm. Special thanks to RektInator, JTAG & Dasfonia.

Disclaimer

This software has been created purely for the purposes of academic research. Project maintainers are not responsible or liable for misuse of the software. Use responsibly.