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