Here is the full list of all 20 Chaos on Wheels achievements.
Complete campaign
Kill Helios clone in campaign
Win a deathmatch battle
Complete the tutorial
Create your Steam Chaos Career profile
Run over any 10 animals in any game mode
Run over any 50 animals in any game mode
Run over any 100 animals in any game mode
Unlock chapter 2 in the campaign
Win deathmatch battle without being killed
Destroy 10 AI cars in Campaign
Destroy 50 AI cars in Campaign
Destroy 100 AI cars in Campaign
Buy first car
Kill 3 opponents without dying
Kill 5 opponents without dying
Kill 10 opponents without dying
Reach Level 50
Reach Level 100
Screenshot Car in Garage