File Formats

This chapter documents various file formats used in LEGO Rock Raiders.

WAD File

The WAD (or WWAD) file is a container file format which is not compressed1 or encrypted. It is used to combine multiple files into a single file. It's name was possibly derived from Where's All the Data similar to that of the game DOOM which uses a similar resource archive of the same name.
Structure
The structure of the WAD file is relatively simple and can be broken down into five sections:

Header
Relative File Path Index
Full File Path Index
File Meta Index
File Data

Header
CHAR[4] "WWAD"
UINT32 File Count
Relative Path Index
CHAR[n] Null terminated string
Full Path Index
CHAR[n] Null terminated string
Meta Index
UINT32 Compression Flag
UINT32 Data Size Uncompressed
UINT32 Data Size Compressed
UINT32 Data Offset
File Data
The File Data section contains the raw file data from all the files added into the WAD file. It remains unchanged from their original sources and can be extracted as-is.
LRR Usage
In LEGO Rock Raiders (Windows) there are 2 WAD resource archives LegoRR0.wad & LegoRR1.wad It is used to hold game assets such a configuration, images, 3D models and more.
Extraction Tools
Several tools have been developed that support extraction and/or building of WAD files for LEGO Rock Raiders.

WAD Recycler (by Cyrem)
WAD Refinery (by Cyrem)
Cafeferia (by Cyrem)
WAD CLI Tool (by ogun)
WAD Tool (by Strider)

1 While it appears compression could have been supported, there is no evidence to show it was ever used.