The former core theme "Igames" has been dropped from the coppermine package for easier maintenance. For those who still wish to use that theme, here it is as a separate download: http://sourceforge.net/projects/coppermine/files/Themes/1.5.x/cpg1.5.x_theme_igames_v1.1.zip/download
While removing from the coppermine core the theme has been added to the section of the SVN repository where the user-contributed themes are stored: http://coppermine.svn.sourceforge.net/viewvc/coppermine/branches/cpg1.5.x/themes/