Here is the full list of all 19 Rush Rally 3 achievements.
Travel over 1000 km
Finish first in Coin Collect mode and collect all the coins
Finish first in Turbo mode and collect all the turbos
Finish first in Airstrike mode without getting hit
Hit over 1000 objects
Finish first in Roadworks mode without hitting anything
Finish first in Traffic mode without hitting another car
Complete the Rally Cross Game mode
Complete the Skill Games mode
Finish first in Skill Gates mode without missing or hitting a gate
Complete the Single Rally Game mode
Win a trophy in Single Rally mode without repairing your car
Win a trophy in the Rush Rally Career Championship
Own an R-Class vehicle
Win a trophy in the Semi-Pro Career Championship
Win a trophy in the Amateur Career Championship
Win a trophy in the Junior Career Championship
Finish a race without hitting anything
Finish a race without going off the track