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