The fuzion_.challenge.gbx file you have requested: Maps Levels Missions / Tracks / Miscellaneous / E to F Titles / Fuzion - 2.84kb is not available. Perhaps try browsing all files for the game TrackMania Nations Forever and upload any files you want to share or are missing. This is the only information we could locate:
For more information on TrackMania Nations, visit Trackmania.filefront.com This is a complex track, created to fuse the ideas of confusion and thats of a normal track. It will involve some leaps and jumps into an unknown future.