Here is the full list of all 44 Retrowave achievements. It takes around 40-50 hours to unlock all of the achievements on Windows.
Play 1000 times
Buy the 19th car
Buy the moon car
Buy VHS Car
Buy the 16th car
Buy the 15th car
Buy the 14th car
Buy the 13th car
Buy the 12th car
Buy the 11th car
Reach $1000000
Reach $100000
Buy the 10th car
Buy the 9th car
Buy the 8th car
Buy the 7th car
Buy the 6th car
Buy the 5th car
Reach 50.000 score in Hard
Buy police beacon
Play 100 times
Buy the 86
Buy turbo
Buy nitro
Buy a new paint
Buy neon wheels
Play 10 times
Reach $10000
Play two-way mode
Buy the 3rd car
Buy the 2nd car
Play speed bomb mode
Play easy mode
Play time attack mode
Play peaceful mode
Reach $1000
Play hard mode
Play your first game
Play one-way mode
Play normal mode