Here is the full list of all 37 Breakneck achievements.
Spend 120s in the air
Boost for 120s in total
Play for 3 days in a row
Travel 50,000m in one run
Travel 100,000km in total
Travel 10,000km in total
Collect 1,000 Coins
Collect 10,000 Coins
Collect 100,000 Coins
Collect 50 Pick-ups
Collect 500 Pick-ups
Collect 5,000 Pick-ups
Travel 1,000,000km in total
Travel 100,000m in one run
Travel 200,000m in one run
Spend 600s in the air
Spend 6,000s in the air
Boost for 600s in total
Boost for 6,000s in total
Upgrade 1 Pick-up to max level
Upgrade 4 Pick-ups to max level
Unlock all Pick-ups
Unlock all Perks
Try 5 unique Perk combinations
Try 10 unique Perk combinations
Try 50 unique Perk combinations
Reach pilot level 5
Reach pilot level 10
Reach pilot level 20
Finish in at least prize tier 6
Finish in at least prize tier 3
Finish in prize tier 1
Play for 7 days in a row
Play for 14 days in a row
Race in 3 different types of weather
Race in 5 different types of weather
Race in 6 different types of weather