Here is the full list of all 43 Little Racers STREET achievements.
Finish an online race
Finish 10 online races
Finish a race in last place starting in the first place of the grid
Win a race with a heavily damaged car
Beat developers best time on event A-72 - 47.397
Beat developers best time on event B-64 - 37.768
Beat developers best time on event C-68 - 42.701
Beat developers best time on event D-28 - 42.652
Have all available cars in your garage
Purchase your first Class A car
Win 200 races in career mode
Purchase your first Class B car
Pay 2 million credits in repairs
Win a class A or B race without suffering serious damage
Finish 200 races in career mode
Win a race in unfair difficulty level
Have 20 cars in your garage
Drive a total of 500 Kilometers
Win 100 races in career mode
Get to 1st place in the ranking
Finish 100 races in career mode
Complete 20 challenges
Improve your ranking to place 10
Purchase your first Class C car
Beat developers best time on event E-28 - 22.134
Win 10 snow events
Improve your ranking to place 50
Earn your first million credits
Win 10 rain events
Improve your ranking to place 100
Win 50 races in career mode
Customize a car in career mode
Purchase your first Class D car
Finish 50 races in career mode
Tune a car to the maximum level
Improve your ranking to place 200
Win 20 races in career mode
Finish 20 races in career mode
Win a race starting in the last place of the grid
Win a race with an underpowered car
Finish your first race in career mode
Purchase your first Class E car
Win an online race