Full list of all 25 Project Gotham Racing 3 achievements worth 1,000 gamerscore.
The base game contains 20 achievements worth 900 Gamerscore, and there are 2 DLC packs containing 5 achievements worth 100 Gamerscore.
Qualify for a tournament and play in the first elimination round
Win a Cat & Mouse Event as the player in the E class vehicle
Win a Cat & Mouse Event as a player in a non E class vehicle.
Win a Cone Capture Event
Be on the winning team of a Team Cone Capture Event