If you buy oblivion game of the year edition you need to buy oblivion without expansions first
If you buy oblivion game of the year edition you need to buy oblivion without expansions first
if by oblivion you mean the elder scrolls then no, the game of the year edition is the original game and the expansion packs all on one disk, either way it is the same game besides the fact that the game of the year edition has both expansion packs on it, the knights of the nine and the shivering isles.