Here is the full list of all 13 ECO HOLE achievements.
Fix the car.
Create explosives for the first time.
Sacrifice more than seven larvae at a time.
Die more than five times on one of the levels.
Complete the game in less than an hour.
Kill the monster in the wheelchair.
Destroy the slime on the second level.
Feed more than five bodies to a parasite monster.
Kill the monster from the capsule on the third level.
To die at the hands of a monster-girl on the third level.
Turn into a monster yourself.
Complete the game in a cooperative.
Find the car keys to get rid of the big-eared monster.