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