Full list of all 58 Forza Motorsport 4 achievements worth 1,250 gamerscore. It takes around 150-200 hours to unlock all of the achievements in the base game.
The base game contains 48 achievements worth 1,000 Gamerscore, and there is 1 DLC pack containing 10 achievements worth 250 Gamerscore.
Get any Car Manufacturer to Affinity level 50.
Own the five most expensive cars in the game (not including DLC).
Complete the tenth year of Season Play.
Sell a car tuning, paint job, or vinyl group from your storefront.
Beat a Ferrari 330 P4 in any race while driving a Ford GT40 Mark II.
Own every Ferrari included on Disc 1.
Complete the ninth year of Season Play.
Complete the eighth year of Season Play.
Level 50 in Career
Complete the seventh year of Season Play.
Complete the sixth year of Season Play.
Complete the fifth year of Season Play.
Level 40 in Career
Complete the fourth year of Season Play.
Complete the third year of Season Play.
Post a time in every Rivals mode event.
Complete 10 Autocross events without hitting gate cones.
Level 30 in Career
Earn a perfect Drift score.
Visit the Message Center on at least five unique days.
Level 20 in Career
Share a car in your garage with your Car Club.
Take a photo of any car in every Home Space.
Reach 240 mph in any car.
Fully explore any car in Autovista.
Earn a perfect Speed score.
Create or join a Car Club.
Reach 88 mph in a DeLorean.
Create a car tuning file for your car.
Upload a movie to Forzamotorsport.net.
Complete the second year of Season Play.
Level 10 in Career
Earn a perfect Drafting score.
Create a paint job or vinyl group for your car.
Complete the first year of Season Play.
Earn a perfect Pass score.
Knock down a gold bowling pin in Car Bowling.
Create a custom playercard with badges and titles.
Use Kinect to drive any car in Free Play.
Complete a lap around the TopGear Test Track while driving a KIA cee'd.
Level 1 in Career
Race and defeat an opponent in Rivals mode.
Earn a perfect Turn score.
Import a file from Forza Motorsport 3.
Be the winning bidder on any "unicorn" car in the Auction House.
Complete the very first race in the game.
Finish 1st in every single race in the Event List in Career play mode.
Finish a race on every race track in Forza Motorsport 4.
Complete 5 online circuit races in the 2010 Porsche 911 Sport Classic.
Complete 5 online circuit races in the 1982 Porsche 911 Turbo 3.3.
Complete 3 online circuit races in the 2010 Porsche Panamera Turbo.
Complete 3 online circuit races in the 2007 Porsche 911 GT3 RS (997).
Earn 30,000CR in the 2008 Porsche #7 Penske Racing RS Spyder Evo.
Earn 30,000CR in the 2007 Porsche 911 Turbo (997).
Win online at the Nürburgring Nordschleife Full track in the 2012 Porsche 911 GT2 RS.
Win online in the 2003 Porsche Carrera GT.
Win online in the 2011 Porsche #45 Flying Lizard 911 GT3-RSR (997).
Win online in the 1973 Porsche 911 Carrera RS.