Think its clearly elder scrolls series..Its the main rpg of this erra..Its clearly sold millions of copies..From morrowind to oblivion now to elder scrolls five..Its shined through many decades..Its been one of the few series to with stand the test of time..It will sell for a long time to come..

Gladestone1

This is supposed to be the most important game of the decade not the most succesful and the elder scrolls game that had the most impact on gaming would probably be Daggerfall and that came out in 1996.