DAT3 - Fallout DAT Tool

Fallout .dat management cli.

Crossplatform, static Rust re-implementation of DAT2, with minor differences.

• Usage
• Differences from DAT2
• Building

Usage

dat3

Fallout .dat management cli

Usage: dat3 <COMMAND>

Commands:
  l     List files in a DAT archive (command: l)
  x     Extract files from a DAT archive with directory structure (command: x)
  e     Extract files without creating directories - all files go to one folder (command: e)
  a     Add files to a DAT archive (command: a)
  d     Delete files from a DAT archive (command: d)
  help  Print this message or the help of the given subcommand(s)

Options:
  -h, --help     Print help
  -V, --version  Print version

Extract all files

dat3 x master.dat

Extract all files into directory

dat3 x master.dat -o ./extracted/

Extract specific files

# Mix forward and backward slashes on any platform
dat3 x master.dat art/critters/HMMAXX.FRM scripts\generic.int

Extract without directory structure (flat)

dat3 e master.dat -o ./files/

List files in a DAT archive

# List all files
dat3 l master.dat

# List specific files (supports cross-platform paths)
dat3 l master.dat art/critters/vault.frm text\english\quotes.txt

# List files from response file
dat3 l master.dat @files_to_list.txt

Response file support

# Create a file listing files to process
echo "art/critters/vault.frm" > files.txt
echo "text\\english\\quotes.txt" >> files.txt
echo "scripts/generic.int" >> files.txt

# Use with any command (mutually exclusive with explicit file lists)
dat3 l master.dat @files.txt
dat3 x master.dat @files.txt -o extracted/
dat3 e master.dat @files.txt -o flat/
dat3 a master.dat @files.txt
dat3 d master.dat @files.txt

Add files to a DAT archive

# Add single file
dat3 a master.dat myfile.txt

# Add directory (automatically recursive)
dat3 a master.dat myfolder/

# Add with max compression level
dat3 a master.dat largefile.txt -c 9

# Add to specific directory in archive
dat3 a master.dat myfile.txt -t "art/graphics"

# Force DAT1 format for new archive
dat3 a newarchive.dat myfiles/ --dat1

# Add files from response file
dat3 a master.dat @files_to_add.txt

Delete files from archive

# Delete single file (cross-platform paths supported)
dat3 d master.dat text/english/quotes.txt

# Delete multiple files
dat3 d master.dat file1.txt art\critters\vault.frm

# Delete files from response file
dat3 d master.dat @files_to_delete.txt

Delete only deletes file records. It doesn't reduce archive size.

Differences from DAT2

• Directories are always processed recursively.
• Shrink (k command) not implemented.
• Flat extraction is a separate command, e.
• DAT1 compression (LZSS) not implemented, only decompression. Fallout 1 style .dat files are thus created without compression.

Building

Requirements

• Rust 1.70 or newer
• Target-specific toolchains (install as needed)

Build

./build.sh

Builds are static.

Binaries will be at:

target/x86_64-unknown-linux-musl/release/dat3
target/x86_64-pc-windows-gnu/release/dat3.exe
target/i686-pc-windows-gnu/release/dat3.exe