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