10,000 Wreck Points 5pts  -  Accumulated 10,000 Wreck Points

Circuit Master 10pts  -  Won a Circuit set to Master AI Difficulty
Down-and-Back Master 10pts  -  Won a Down-and-Back set to Master AI Difficulty
Point-to-Point Master 10pts  -  Won a Point-to-Point set to Master AI Difficulty
Lap Knockout Master 10pts  -  Won a Lap Knockout set to Master AI Difficulty
10 Wins 10pts  -  Finished in 1st place in 10 Races
25 Wins 10pts  -  Finished in 1st place in 25 Races
50 Wins 10pts  -  Finished in 1st place in 50 Races
100 Wins 10pts  -  Finished in 1st place in 100 Races
50,000 Wreck Points 10pts  -  Accumulated 50,000 Wreck Points
100,000 Wreck Points 10pts  -  Accumulated 100,000 Wreck Points

100 Kills 15pts  -  Killed 100 Opponents
250 Kills 15pts  -  Killed 250 Opponents
500 Kills 15pts  -  Killed 500 Opponents
500,000 Wreck Points 15pts  -  Accumulated 500,000 Wreck Points

Tough Guys series 25pts  -  Survived every event in this series
All Semi Auto Medals 25pts  -  Won every Semi Auto Medal in Campaigns

All Full Auto Medals 75pts  -  Won every Full Auto Medal in Campaigns
Fine Balance series 75pts  -  Survived every event in this series

1,000 Kills 40pts  -  Killed 1,000 Opponents
1,000,000 Wreck Points 40pts  -  Accumulated 1,000,000 Wreck Points

Online Only Achievements List - Have to achieve these ranks by playing on LIVE to acquire.

Rank Level 1 5pts - Achieved Rank Level 1 in Xbox Live play
Rank Level 2 5pts - Achieved Rank Level 2 in Xbox Live play
Rank Level 3 5pts - Achieved Rank Level 3 in Xbox Live play
Rank Level 4 10pts - Achieved Rank Level 4 in Xbox Live play
Rank Level 5 10pts - Achieved Rank Level 5 in Xbox Live play
Rank Level 6 10pts - Achieved Rank Level 6 in Xbox Live play
Rank Level 7 15pts - Achieved Rank Level 7 in Xbox Live play
Rank Level 8 15pts - Achieved Rank Level 8 in Xbox Live play
Rank Level 9 15pts - Achieved Rank Level 9 in Xbox Live play
Rank Level 10 30pts - Achieved Rank Level 10 in Xbox Live play

Secret Achievements List

Impossible series 30pts - Survived every event in this series
Enduro series 20pts - Survived every event in this series
Warlord series 20pts - Survived every event in this series
Gang Wars series 20pts - Survived every event in this series
Sudden Death series 20pts - Survived every event in this series
Overtake series 20pts - Survived every event in this series
Dominator series 20pts - Survived every event in this series
Ambush series 20pts - Survived every event in this series
Underdogs series 20pts - Survived every event in this series
Street Races series 20pts - Survived every event in Career Mode
Rampage series 20pts - Survived every event in this series
Hunter series 20pts - Survived every event in this series
Time Trials series 20pts - Survived every event in this series
Speed Kills series 100pts - Survived every event in this series
Semi Auto Medal 5pts - Finished a Race and won a Semi Auto Medal
Full Auto Medal 10pts - Finished a Race and won a Full Auto Medal
Three in a Row 10pts - Killed three Opponents in rapid succession
Five in a Row 15pts - Killed five Opponents in rapid succession
Rampage 25pts - Killed eight Opponents in rapid succession

Play through Career Mode to unlock these cars

Enforcer - Earn any medal in the Swift Justice event
Phantom - Earn any medal in the Bayside Brawl event
Wraith - Earn any medal in the Killer Curves event
Streamline - Earn any medal in the Shore Leave event
Demon - Earn any medal in the Rod Rage event
Outlaw - Earn any medal in the Toll 'N' Thunder event
Vulcan - Earn any medal in the Catch My Drift event
TEC - Earn any medal in the Heads Up event
Magnus - Earn any medal in the Heads Up event
Opulent - Earn any medal in the Laps of Luxury event
Ardent - Earn any medal in the Boxed In event
Kodiak - Earn any medal in the Monster Mash event
Honcho - Earn any medal in the King of Bling event
Guardian - Earn any medal in the Short Stretch event
Roughneck - Earn any medal in the Trail Breaker event
Hitman - Earn any medal in the Tommygunner event
Rampart - Earn any medal in the Raging Bull event
Hookzilla - Earn any medal in the No Parking event
Warlord - Earn a Full Auto medal in the Armageddon event