Reply To: Hardest game you have completed. HOME › Forums › Games › Hardest game you have completed. › Reply To: Hardest game you have completed. March 25, 2020 at 1:17 am #27425 WaggishOhio383Participant FUNK: 4,494Rank: Psychic Gibbon Super Mario Bros Wii world 8 level 1. The hardest level of any game I’ve just about ever played. It’s the first level of the world and it’s harder than the final boss fight.