NCS (Nexus Config Store) parser for Borderlands 4

NCS files are Oodle-compressed configuration stores used by the game.

Format Overview

NCS Data Format ([version]NCS)

Compressed configuration data:

• Byte 0: Version byte (typically 0x01)
• Bytes 1-3: "NCS" magic
• Bytes 4-7: Compression flag
• Bytes 8-11: Decompressed size
• Bytes 12-15: Compressed size
• Bytes 16+: Payload

NCS Manifest Format (_NCS/)

Index files listing NCS data stores:

• Bytes 0-4: "_NCS/" magic
• Bytes 6-7: Entry count
• Remaining: Metadata and string table