Unknown to many, both Sid Meier's Civilization II and Sid Meier's Alpha Centauri were mainly his designs, not Sid_Meier's, though of course both games borrow from Sid's original Civilization concept.
His last game is Rise of Nations, a real-time strategy game, published by Microsoft.
Big Huge Games: where Brian currently is
Firaxis: his former company; it currently "owns" the Civilization series
Microsoft: publishers of Rise of Nations