Here is the full list of all 7 Monsterland achievements.
Get out of the derelict prison alive.
Leave Turbine, and your former clinic, smeared in blood.
Ascend from the horrors of Bunker City.
Reach minimum safe distance from the ship.
Escape the unthinkable carnage of the Undercity.
Slaughter your way through Red Bloc territory.
Defeat the man who started it all. Save the world. Live happily ever after. Maybe?