Top 100 Opus Magnum Videos With The Longest Duration by Impossibum PlaysTop 100 » 200 » 300 » 400 » 500Video TitleDurationCategoryGame1.Opus Magnum - Use Alchemical Machines To Transmute Base Elements Into Useful Compounds #233:07Opus Magnum 2.Opus Magnum - Use Alchemical Machines To Transmute Base Elements Into Useful Compounds - PC Gameplay30:03Opus Magnum 3.Opus Magnum - Use Alchemical Machines To Transmute Base Elements Into Useful Compounds #329:47Opus Magnum Top 100 » 200 » 300 » 400 » 500