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