Full list of all 50 Forza Motorsport 3 achievements worth 1,000 gamerscore. It takes around 150-200 hours to unlock all of the achievements on Xbox 360.
Complete a Time Trial.
Earn over 100,000 points in a single lap.
Own (at least) one car from every manufacturer.
Complete the sixth year of Season Play.
Complete the fifth year of Season Play.
Reach Driver Level 50 in Season Play mode.
Complete the fourth year of Season Play.
Level 45 in Season Play
Travel in excess of 200 mph.
Reach Driver Level 40 in Season Play mode.
Complete your first Forza Motorsport movie.
Upload a photo or movie to Forzamotorsport.net.
Take a photo of your car.
Sell a Tuning Setup, Design, or Vinyl Group from your storefront.
Race at every track location in the world.
Level 35 in Season Play
Sell a car in the Auction House.
Create a car tuning file for your car.
Complete the third year of Season Play.
Reach Driver Level 30 in Season Play mode.
Win a race using cockpit view.
Level 25 in Season Play
Reach Driver Level 20 in Season Play mode.
Complete the second year of Season Play.
Level 15 in Season Play
Win an auction by outbidding someone.
Reach Driver Level 10 in Season Play mode.
Level 9 in Season Play
Buy something using the storefront.
Complete the first year of Season Play.
Earn over 1,000 points in a single drift section.
Level 8 in Season Play
Achieve Car Level 5 in Season Play mode.
Level 7 in Season Play
Level 6 in Season Play
Achieve Car Level 4 in Season Play mode.
Level 5 in Season Play
Achieve Car Level 3 in Season Play mode.
Level 4 in Season Play
Complete your first weekend race in Season Play mode.
Achieve Car Level 2 in Season Play mode.
Level 3 in Season Play
Level 2 in Season Play
Create a paint job or vinyl group.
Complete your first weekday event in Season Play mode.
Level 1 in Season Play
Achieve Car Level 1 in Season Play mode.
Complete the very first race in the game.
Jump five feet.
Achieve a gold trophy in every single race in the Event List in Season Play mode.