Complete the following tasks to unlock the corresponding achievement.

Achievement	How to unlock
Careful walls	Human #13 - Finish the mission without losing HP.
Cleaning up the webs	Introduction #3 - Make the gargoyle step on each web trap and complete the mission.
Couriers of destiny	Monster #20 - Complete the mission without losing a single unit.
Glass horse	Human++ #19 - Complete without getting hit.
Goobsessive compulsive disorder	Introduction #8 - Kill all the goos.
Goopocalypse	Monster++ #16 - Kill all enemies and complete the mission.
Not so mobile	Human #3 - Finish the mission without moving the mobile walls.
People > King	Human++ #12 - Complete the mission without losing a single unit.
So much thinking	Monster #19 - Finish the mission without losing a single unit.
Stuck a little	Human++ #8 - Complete the mission without losing a single unit.
Survival instinct	Monster++ #19 - Complete the mission with 5 shrooms alive.
Tear down walls and their hearts	Monster #7 - Finish the mission without losing a single unit.
Too cool to fight	Monster++ #5 - Complete the mission without the shroom attacking.
Wasting troops	Human++ #15 - Kill a manticore and complete the mission.
Way to go	Introduction #6 - Kill the minotaur with the spike trap.
We can do it too	Monster++ #4 - Finish the mission without losing a single unit.
Why did you even do that?	Human #20 - Kill the slime and win the mission.