The Imperial class war frigate is a limited edition ship available from shipyards in April 2010. The layout differs from a normal war frigate. Imperial class ships have one of the following adjectives in their names: Audacious, Colossal, Conquering, Courageous, Dauntless, Defiant, Devastating, Formidable, Glorious, Goliath, Illustrious, Implacable, Impregnable, Indefatigable, Indomitable, Intrepid, Invincible, Irresistible, Majestic, Resolute, Royal, Sovereign, Superb, Thundering, Tremendous, Triumphant, Valiant, Venerable, Victorious.