A downloadable add-on for Nuts & Bolts, titled "L.O.G.'s Lost Challenges", was released on 7 April 2009. The content is set in the "Test-o-Track" area of Mumbo's Motors, and includes six new missions with twelve additional Jiggies to earn: six for completing the missions with pre-determined vehicles, and six for completing the missions with vehicles designed by the player. Collecting all twelve Jiggies will unlock "Hero Klungo Sssavesss Teh Universsse", a set of new levels for the "Hero Klungo Sssavesss Teh World" minigame.