Here is the full list of all 18 Hoversteppers achievements.
Keep the combo meter at Hoversteppin’ for 20 seconds
Land every character’s special trick
Score an S rank in every challenge in Freestyle Warehouse
Score an S rank in 15 challenges
Perform a boost that lasts for 12 seconds
Land a x5 front or backflip in a single jump
Get a total combo of 20,000
Turn on all the fans in Storm Drain
Complete 8 challenges in Storm Drain
Smash every sign in Kingfisher Park during a single combo
Complete 8 challenges in Kingfisher Park
Open all the tunnel doors in Metro
Complete 8 challenges in Metro
Travel 100 miles (160km) by hoverboard
Perform a total of 1000 tricks
Complete every challenge in The Gallery
Reveal the hidden painting in The Gallery
Score an S rank in 25 challenges