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