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