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