Special:UncategorizedFiles contains over a thousand uncategorized photos. When there are over a thousand you can't see them all. If you know the first part of a file name you may find it using Special:Allpages but if you don't you are probably stuck.
I have just categorized all with names starting with "Cevo" or "C-evo". There may be other C-evo images that aren't so clearly named.
Someone should categorize most of the remaining thousand-plus in categories relevant to their games - as an example, see the subcategories of Category:Images (Civ2). Other games may have even more useful subcategorization schemes.