Here is the full list of all 45 Flatout 3: Chaos & Destruction achievements.
Complete all splatout levels.
Score a 150 hit combo.
Score a 100 hit combo.
Score a 60 hit combo.
Get a score of 7 million.
Score a 50 hit combo.
Score a 40 hit combo.
Be destroyed by a train.
Complete a challenge.
Finish a Nightshift race as loser.
Win all Speed tracks
Win all Kansas Offroad races.
Win all Offroad races.
Win on a reversed track.
Win all Utah Offroad races.
Win a Nightshift race.
Win on a Speed track.
Score a 30 hit combo.
Score a 20 hit combo.
Win all Monstertruck challenges.
Win a Monstertruck challenge.
Win a normal Battle Arena match.
Score a 10 hit combo.
Kill one zombie.
Complete all stunts.
Win a Nightmare stunt.
Drive into water.
Win an Industrial stunt.
Win a Golf stunt.
Win a Big Battle Arena match.
Win all races.
Win all Detroit races.
Win all Vienna races.
Win all Rome races.
Win all Outdoor races.
Win all Uranium Mine races.
Win all Harbor races.
Win all Nightshift races.
Win all normal Battle Arenas.
Win all Big Battle Arenas.
Win a race.
Play a multiplayer game.
Complete 25 challenges.
Complete all challenges.
Kill 10000 zombies.