ICO Format (Halloween Harry)

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ICO Format (Halloween Harry)
ICO Format (Halloween Harry).png
Format typeTileset
Max tile countUnlimited
PaletteShared VGA
Tile names?No
Minimum tile size (pixels)0×0
Maximum tile size (pixels)65535×65535
Plane count1
Plane arrangementLinear VGA
Transparent pixels?Palette-based
Hitmap pixels?No
Supports sub-tilesets?No
Compressed tiles?No
Hidden data?No

alien.ico/harry.ico (and others inside the .bnk files) are tilesets containing the graphics for Halloween Harry/Alien Carnage. They consist of a number of consecutive image chunks composed mostly of raw data.

There is no palette stored in the ICO file. The data is merely palette indices prefixed by a two word header giving the image chunk's dimensions. It is possible to determine the number of chunks by reading through the ICO file.

Data type Name Description
UINT16LE width Width of image
UINT16LE height Height of image
BYTE[width * height] data Pixel data (8bpp)


The following tools are able to work with files in this format.

Name PlatformView images in this format? Convert/export to another file/format? Import from another file/format? Access hidden data? Edit metadata? Notes
Camoto Linux/WindowsYesYesYesN/AN/A


If you find this information helpful in a project you're working on, please give credit where credit is due. (A link back to this wiki would be nice too!)