Oscuro's Oblivion Overhaul from Best Oblivion Mods

This is one of the most essential Oblivion mods; it will hook you in and immerse you in the game's world. Try Oscuro's Overhaul if you want to play the game with new, significant changes to the leveling mechanic. Cyrodiil will become an unexpectedly dangerous battle zone; running from encounters may be a necessity.