Topic on User talk:JohnTHedgehog
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This was actually discussed at forums http://community.pcgamingwiki.com/topic/996-cropped-images-and-general-wiki-guidlines/?p=4364
I know you have good intentions, but wiki does downscale images anyway so no need to worry if images filesize is large :)
However next time you upload images please also consider using games full name in filename.