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