SCTParser

[!IMPORTANT] This project is now implemented in Chaos Zero Nightmare ASSet Ripper. For a better and complete user experience i recommend using that tool. This will remain here as a research project.

What is this

This is a small program that is able to parse the custom images format (.sct) used in games made with Yuna Engine (SuperCreative engine) like Chaos Zero Nightmare (tested) and Epic Seven (not tested).

The program supports both SCT and SCT2 versions of the format, which implementation is based on reverse engineering analysis using IDA Pro.

Notes

• it was a fun reverse/research project

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Usage

Usage: SCTParser <input_path> <output_path> [--verbose]
  input_path: File or directory to process
  output_path: Output directory for PNG files
  --verbose / --v: Optional flag for detailed output

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File Format Structure

SCT (Legacy Format)

• 3-byte signature: "SCT"
• 1-byte pixel format
• 2-byte width/height
• LZ4 compressed data

SCT2

• 4-byte signature: "SCT2" (0x32544353)
• 34-byte header with extended metadata
• Flags for compression, alpha, cropping, mipmaps
• Optional LZ4 compression

See code documentation for complete header layout.

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Supported Formats

The parser correctly handles various pixel formats:

• RGB: RGB565, RGB565_LE
• RGBA: Standard RGBA, ETC2_RGBA8
• ASTC: 4x4, 6x6, 8x8 compressed textures
• L8: 8-bit luminance

Credits

If you like this project, feel free to leave a star, and check out my other stuff. And if you use it, feel free to credit <3