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