Accomplish the indicated achievement to get the corresponding number of Gamerscore points:

Time Chaser (10 points): Complete a full lap in Time Attack.
Fast Learner (10 points): Beat the ghost car in Time Attack.
Qualifier (10 points): Complete a qualifying session.
Front Man (5 points): Get pole position in novice.
Pace Setter (10 points): Get pole position in semi-pro.
Pole Sitter (15 points): Get pole position in professional.
Novice Winner (10 points): Win a race in novice.
Front Runner (15 points): Win a race in semi-pro.
Like a Pro (20 points): Win a race in professional.
Clean Conscience (25 points): Win a race in professional without damaging your car.
Championship Contender (20 points): Complete a full championship.
The Champ (30 points): Finish 1st in a championship.
Champ for Life (40 points): Finish 1st in a championship in professional.
Racing Icon (50 points): Finish all championships.
All or Nothing (10 points): Complete a tryout.
Contracted (10 points): Complete a contract.
Trophy Owner (20 points): Complete a contract with full points.
Trophy Collector (50 points): Complete all contracts with full points.
On Call (10 points): Complete a stand-in.
Clean Sweep (30 points): Completed all contracts in a Career.
Race Initiator (10 points): Host an Xbox LIVE player match.
Race Generator (30 points): Host 50 Xbox LIVE player matches.
Event Creator (10 points): Host an Xbox LIVE ranked match.
Racing Promoter (30 points): Host 50 Xbox LIVE ranked matches.
Club Racer (10 points): Finish an Xbox LIVE player match.
Veteran Club Racer (25 points): Finish 50 Xbox LIVE player matches.
Xbox LIVE Race Driver (10 points): Complete an Xbox LIVE ranked match.
Xbox LIVE Veteran (25 points): Complete 50 Xbox LIVE ranked matches.
Proven Winner (20 points): Finish 1st in an Xbox LIVE ranked match.
Player Match Winner (20 points): Finish 1st in an Xbox LIVE player match.
Club Icon (50 points): Finish 1st 50 times in an Xbox LIVE player match.
Legendary (50 points): Finish 1st 50 times in an Xbox LIVE ranked match.
Team Racer (10 points): Complete a cooperative HotSeat game.
Social Racer (10 points): Complete a competitive HotSeat game.
Team Win (10 points): Win a cooperative HotSeat game.
Ownage (10 points): Win a competitive HotSeat game.
Monza Win (20 points): Finish 1st on Monza in Pro.
Brno Win (20 points): Finish 1st on Brno in Pro.
Oschersleben Win (20 points): Finish 1st on Oschersleben in Pro.
Macau Win (20 points): Finish 1st on Macau in Pro.
Pau Win (20 points): Finish 1st on Pau in Pro.
Porto Win (20 points): Finish 1st on Porto in Pro.
Zandvoort Win (20 points): Finish 1st on Zandvoort in Pro.
Brands Hatch Win (20 points): Finish 1st on Brands hatch in Pro.
Curitiba Win (20 points): Finish 1st on Curitiba in Pro.
Valencia Win (20 points): Finish 1st on Valencia in Pro.
Anderstorp Win (20 points): Finish 1st on Anderstorp in Pro.
Apex Hunter (10 points): Finish 1st in a race with a custom car setup.
Laguna Seca Win (20 points): Finish 1st on Laguna Seca in Pro.
Road America Win (20 points): Finish 1st on Road America in Pro.