I’ve added pages (Flat retailer, Gaming Variant, Pub) on your site. Please check.
Sliders were created Slider Revolution plugin. This plugin is not activated on your site. If you decide to install it, go to Appearance > Install plugins. Here – https://dropmefiles.com/kDIYt you can downloads archives of 3 slider of mentioned pages, go to Slider Revolution and import them one by one then you will be able to assign sliders with pages via Page Layout settings – http://prntscr.com/qh29s0