I gave up on doing Time Trial 16 long ago. I couldn't even get bronze without cheats, with cheats i barely managed to get silver, after many attempts.
Games 100% Complete
TES IV Oblivion, Fable II, Assassin's Creed, Assassin's Creed 2, Lego Star Wars TCS, Call of Duty 4, Call of Duty World at War, Modern Warfare 2, Call of Juarez: Bound In Blood, The Saboteur, Star Wars TFU, Civilisation Revolution, Dash of Destruction, Dead Rising Case Zero, Halo Reach (w/o DLC), Metro 2033, Mass Effect 2 (w/o DLC), Call of Duty Classic, Mass Effect
The Orange Box, Battlefield Bad Company 2, Call of Duty Black Ops, Medal of Honor