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