The Porsche Unleashed Add-on for Need for Speed: Hot Pursuit has 4 achievements worth 75 gamerscore.
Drive for a mile (1.6 kilometres) on shortcuts in a race and win it in the Porsche 959
Get Gold or Distinction in all Porsche Pack events
Drive the Porsche 911 Speedster for 20 miles (32.1 kilometres)
Win an online event in the Porsche 911 Turbo