Here is the full list of all 22 Car Demolition Clicker achievements.
Obtain all other achievements (without post-release ones)
Collect 50 faction points for "Observers" faction
Use reset option
Unlock Observers faction
Collect 50 faction points for "The Mob" faction
Beat Darkside Truck
Buy final weapon
Collect 1000 faction points
Buy final drone
Buy 4-gun drone
Hold 10 milion $
Destroy a neon sign
Buy a 3-gun drone
Buy a 2-gun drone
Visit proving grounds stage
Collect 50 faction points for "Lab Rats" faction
Visit gas station stage
Use a perk
Visit ice cave stage
Visit construction site stage
Destroy your first car
Fill all drone slots