Here is the full list of all 24 Pressure Overdrive achievements.
Brought 5 love-touched enemies to the finish line.
Got in love touch with 10 enemies.
Defeated 18 enemies while a powerup was active.
Finished 10 Hornets with the railgun without missing once.
Had a Spatank drag the buggy with a grappling hook for 30 seconds.
Defeated 100 enemies through ramming.
Finished a level without taking any damage.
Defeated all enemies in a level (Tutorial excluded).
Finished 20 levels in Endless mode.
Didn't touch the ground for 15 seconds.
Finished a level with the buggy at maxed-out hull.
Finished a level with a buggy at maxed-out pressure capacity.
Defeated 5 enemies with one strike.
Finished a level with having activated underbody or rear explosives for 20 times.
Finished a level with a fully upgraded Teslagun and Tesla secondary.
Defeated the Underground Boss in Level 33.
Finished the campaign on Easy difficulty.
Finished the campaign on Normal difficulty.
Finished the campaign on Hard difficulty.
Defeated the Castle Boss in Level 22.
Defeat the Riverbed Boss in Level 11.
Defeated 1000 enemies.
Finish a level without driving on 'low pressure'.
Let a Sucker suck at least 10 pressure pills before destroying it.