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