Here is the full list of all 23 Turbo Dismount achievements. It takes around 15-20 hours to unlock all of the achievements on Windows.
Perform 1000 decapitations.
Totally demolish all vehicles (that can be demolished).
Nail it 100 times.
Do ten strikes with the Bowling Pins.
Complete 100 dismounts with the Pink Lightning.
Try everything once.
Cross the finish line on Skid Marks at 88mph.
Pull ten somersaults in a single dismount.
Reach a record time on Skid Marks.
Fully obliterate Mr. Dismount.
Launch three consecutive dismounts at max velocity.
Get hit by five different NPC vehicles in T-Junction.
Reach a height of 1000ft (305m) in Space Program.
Launch 1000 dismounts.
Cut down 100 trees.
Drive through 1000 turbo pads.
Play a Steam Workshop level.
Totally demolish a single vehicle.
Detonate ten mines in a single dismount on Run DMZ.
Do a successful barrel roll and landing.
Lose only a single limb during a single dismount.
View a replay in slow motion.
Customize Mr. Dismount or a vehicle.