Full list of all 12 Jeremy McGrath's Offroad achievements worth 200 gamerscore. It takes around 8-10 hours to unlock all of the achievements on Xbox 360.
Drive 1000 Miles
2XL Gold Award
Time Trials
Rally Class Career Complete
Drive 100 Miles
Play 1 Hour
Pro Buggy Career Complete
Complete 10 Events
ProLite Career Complete
Win 3 Races
Sportsman Career Complete
Win First Race