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.
Platinum Champion
Gold Champion
Rank 1
Style Racer Badge
Silver Champion
Bronze Champion
Steel Champion
Rank 5
Pro Racer Badge
Exotic Car Club
Lamborghini Owners Club
Ferrari Owners Club
Race Against the Clock
Photographer
Online Professional
Gotham Hero
Gotham TV Sports Fan
Track Builder
Rank 10
Arcade Player
Tournament Qualifier
Cat Champion
Mouse Master
Team Cone Capture Champion
Cone Capture Champion