BFST (Bullfrog String)

What is BFST?

The BFST (Bullfrog String) file format is used in order to specify strings for each piece of in-game text. This aids with localization and translation. BFST files don't have their own character encoding; instead, they use the two BFST files within the BFST's directory in order to specify each character.

File Format

Header

• 4 bytes: Magic number - "BFST"
• 4 bytes: Unknown
• 4 bytes: String count

For each string

• 4 bytes - String offset (from the end of the string count)

For each string (at offset)

• 1 byte - Unknown, always 0x01
• 3 bytes - String length
• n bytes - Each character, specified with an offset in a BFMU file.
• 4 bytes - Padding (may be longer?)