Stripped images of all profiles, comments and these PNG chunks: bKGD,cHRM,EXIF,gAMA,iCCP,iTXt,sRGB,tEXt,zCCP,zTXt,date
using magick -strip from ImageMagick cmd tools.
Illustration
The tool also optimized bit depth. For example, player sprites are down to the depth of 4 without losing quality. Sprites are converted to optimal blit format at runtime anyway, but at least they weight less on disk. Up to 89% less.
bKGD,cHRM,EXIF,gAMA,iCCP,iTXt,sRGB,tEXt,zCCP,zTXt,dateusingmagick -stripfrom ImageMagick cmd tools.Illustration
The tool also optimized bit depth. For example, player sprites are down to the depth of 4 without losing quality. Sprites are converted to optimal blit format at runtime anyway, but at least they weight less on disk. Up to 89% less.