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