Anniversary Edition of Half-Life: Retribution mod includes Half-Life 25th Anniversary Update's new features: - Removed non-working multiplayer and everything connected with it. - All types of debris have been completely removed. - New menu background up to Quad HD resolution as "WON" version - Animated Logo - New loading screen - UI items click sound as "WON" version - Added 4 options in game configuratons "Advanced" - Removed unsupported menu items - Added new menu item for demo campain - New icons for Steam library - include russian translation.