Here is the full list of all 21 BlazeRush achievements.
Be the leader and lose it all 5 seconds before the finish
Defeat the boss
Complete all career missions
Drop a slime while in the lead
Unlock all cars in career
Destroy 20 cars with a soundwave
Kill the opponent with each weapon but the slime
Destroy 50 cars with the autogun
Destroy 30 cars with the missile
Be the king for most of the race
Win in each of the three modes
Overtake the leader a second before the finish
Destroy 40 cars with the saw
Rise from the last spot 5 seconds before the finish
Do a NO SCOPE, while doing a 360
Complete your first serious competition
Die a hundred times
Break the sound barrier
Hit yourself with every possible weapon
Spend 2 seconds in the air
Join an online party