- Extension: RBT
- Company: Sierra Entertainment
Robot files are animation files used in various Sierra computer games. It is a container format that encapsulates video and possibly audio.
All multi-byte numbers are little-endian.
A Robot file begins with the following variable-length header.
bytes 0-5 signature and probably a version (16 00 53 4f 4c 00; bytes 2-4 are 'SOL') bytes 6-7 version bytes 8-9 audio chunk size bytes 10-11 silence chunk size bytes 12-13 unknown bytes 14-15 frame count bytes 16-17 palette data size bytes 18-19 unknown chunk data size bytes 20-24 unknown byte 25 has sound bytes 26-59 unknown bytes 60.. unknown data chunk, size defined by bytes 18-19
After the header is a palette chunk. The size of the palette chunk is defined it bytes 16-17 of the header. The first 37 or 38 bytes have the following format:
bytes 0-24 unknown byte 25 first palette index to replace bytes 29-30 palette count byte 32 palette format (0 = variable, 1 = constant) bytes 33-[36,37] unknown byte [37,38].. palette components
Versions and Games
These are the known Robot format versions known to be associated with particular games and SCI engine revisions:
- Version 4: Police Quest: SWAT
- Version 5: SCI 2.1 and SCI 3
- Version 6: SCI 3