Here is the full list of all 31 SPRAWL achievements.
Complete E3M3
Complete E3M2
It was always about you
Complete E3M1
Know he's with me
Complete E2M4
100,000 years
Pick Up The Rocket Launcher
Complete E2M3
Do you like your new toy?
Complete E2M2
Pick Up The Railgun
He gave me a flower one day
Complete E2M1
Pick Up The Chaingun
Are you Pythia too?
Complete E1M5
He Shot You, You Killed Him
He is charming is he not?
Kill A Mech, Take His Gun
Complete E1M4
What will you do next?
Complete E1M3
I know how it ends
Complete E1M2
Manus Celer Dei
Played your own tune on the decks
Pick Up The Double Barrel Shotgun
Complete E1M1
Pick Up The SMGs
Do you think you are free?