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