Here is the full list of all 22 Pressure achievements.
Never Died
Got best rating in all levels
Defeated 6 enemies with one strike
Destroyed 8 enemies with one strike
Passed on primary weapon
Destroyed all enemies
Collected all coins
Played the 'normal' way
Played 'Absurd' Mode
Played game in co-op mode
Defeated Metal Count
Played 'Easy' Mode
Got best buggy upgrade
Defeated Wellness-Train
Defeated Mantis
Fell off a bridge ten times
Helped out a friend
Defeated 1000 enemies
Defeated an airship
Barely finished with pressure…
Defeated 4 enemies with one strike
First checkpoint not accessed