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