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.
Finish 1st in every single race in the Event List in Career play mode.
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.
Complete the tenth year of Season Play.
Level 50 in Career
Complete the ninth year of Season Play.
Be the winning bidder on any "unicorn" car in the Auction House.
Complete the eighth year of Season Play.
Level 40 in Career
Complete the seventh year of Season Play.
Use Kinect to drive any car in Free Play.
Earn a perfect Drift score.
Complete the sixth year of Season Play.
Beat a Ferrari 330 P4 in any race while driving a Ford GT40 Mark II.
Level 30 in Career
Complete the fifth year of Season Play.
Complete 10 Autocross events without hitting gate cones.
Post a time in every Rivals mode event.
Take a photo of any car in every Home Space.
Reach 88 mph in a DeLorean.
Share a car in your garage with your Car Club.
Level 20 in Career
Complete the fourth year of Season Play.
Sell a car tuning, paint job, or vinyl group from your storefront.
Upload a movie to Forzamotorsport.net.
Earn a perfect Drafting score.
Complete the third year of Season Play.
Level 10 in Career
Complete the second year of Season Play.
Visit the Message Center on at least five unique days.
Race and defeat an opponent in Rivals mode.
Fully explore any car in Autovista.
Create a paint job or vinyl group for your car.
Create a car tuning file for your car.
Complete a lap around the TopGear Test Track while driving a KIA cee'd.
Create or join a Car Club.
Finish a race on every race track in Forza Motorsport 4.
Reach 240 mph in any car.
Create a custom playercard with badges and titles.
Earn a perfect Speed score.
Complete the first year of Season Play.
Knock down a gold bowling pin in Car Bowling.
Earn a perfect Pass score.
Level 1 in Career
Earn a perfect Turn score.
Import a file from Forza Motorsport 3.
Complete the very first race in the game.
Earn 30,000CR in the 2008 Porsche #7 Penske Racing RS Spyder Evo.
Win online in the 1973 Porsche 911 Carrera RS.
Complete 5 online circuit races in the 1982 Porsche 911 Turbo 3.3.
Complete 3 online circuit races in the 2007 Porsche 911 GT3 RS (997).
Complete 3 online circuit races in the 2010 Porsche Panamera Turbo.
Complete 5 online circuit races in the 2010 Porsche 911 Sport Classic.
Win online in the 2011 Porsche #45 Flying Lizard 911 GT3-RSR (997).
Earn 30,000CR in the 2007 Porsche 911 Turbo (997).
Win online in the 2003 Porsche Carrera GT.
Win online at the Nürburgring Nordschleife Full track in the 2012 Porsche 911 GT2 RS.