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