You need to get an S rank for every mission, both normal and hard difficulty, in the game, not just b eating the game with an S rank.
1000 (or 1250):
Halo 3, CoD4, Viking:BfA
Work in Progress:
MoH Airborne, Armored Core 4, GTA IV, Frontlines:FoW, Command & Conquer 3, Orange Box,
Timeshift, Gears of War, Battlestations:Midway, Assassins Creed, Oblivion, Bioshock