The SPR format is used for storing image data (who would've guessed?)
Multiple sprites can be packed into the SPR format.
Appears to depend on a palette?
Four unknown bytes... (255 255 255 255)
Followed by...
- W / INT16
- H / INT16
And then indexed bytes for image (making each frame super small!)
All player sprites are prefixed with _, perhaps they wanted to allow people to add their own sprites? Hey ho.
- _H.SPR : Halloween Harry sprites